David Chaum

Person

Sherman Oaks, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Random sample elections
- Patent number 11,403,903
- Issue date Aug 2, 2022
- Digital Community LLC
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Precomputed and transactional mixing
- Patent number 11,184,338
- Issue date Nov 23, 2021
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Video copy prevention systems with interaction and compression
- Patent number 10,536,670
- Issue date Jan 14, 2020
- David Chaum
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Precomputed and transactional mixing
- Patent number 10,375,042
- Issue date Aug 6, 2019
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Random sample elections
- Patent number 10,050,786
- Issue date Aug 14, 2018
- David Chaum
- G07 - CHECKING-DEVICES
Information Patent Grant
Scan-integrity election systems
- Patent number 8,162,215
- Issue date Apr 24, 2012
- David Chaum
- G07 - CHECKING-DEVICES
Information Patent Grant
Hidden-code voting and marking systems
- Patent number 8,123,114
- Issue date Feb 28, 2012
- David Chaum
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Grant
Ballot integrity systems
- Patent number 7,516,891
- Issue date Apr 14, 2009
- David Chaum
- G07 - CHECKING-DEVICES
Information Patent Grant
Secret-ballot systems with voter-verifiable integrity
- Patent number 7,210,617
- Issue date May 1, 2007
- David Chaum
- G07 - CHECKING-DEVICES
Information Patent Grant
Multi-purpose transaction card system
- Patent number 6,718,314
- Issue date Apr 6, 2004
- InfoSpace, Inc.
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Multi-purpose transaction card system
- Patent number 6,434,238
- Issue date Aug 13, 2002
- InfoSpace, Inc.
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Electronic lock that can learn to recognize any ordinary key
- Patent number 6,318,137
- Issue date Nov 20, 2001
- David Chaum
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Partitioned information storage systems with controlled retrieval
- Patent number 5,956,400
- Issue date Sep 21, 1999
- DigiCash Incorporated
- David Chaum
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Limited-traceability systems
- Patent number 5,878,140
- Issue date Mar 2, 1999
- DigiCash Incorporated
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Limited-traceability systems
- Patent number 5,781,631
- Issue date Jul 14, 1998
- DigiCash Incorporated
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Limited-traceability systems
- Patent number 5,712,913
- Issue date Jan 27, 1998
- DigiCash Incorporated
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Private signature and proof systems
- Patent number 5,493,614
- Issue date Feb 20, 1996
- David Chaum
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automatic real-time highway toll collection from moving vehicles
- Patent number 5,485,520
- Issue date Jan 16, 1996
- Amtech Corporation
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Compact endorsement signature systems
- Patent number 5,434,919
- Issue date Jul 18, 1995
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Desinated-confirmer signature systems
- Patent number 5,373,558
- Issue date Dec 13, 1994
- David Chaum
- G07 - CHECKING-DEVICES
Information Patent Grant
Optionally moderated transaction systems
- Patent number 5,276,736
- Issue date Jan 4, 1994
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Optionally moderated transaction systems
- Patent number 5,131,039
- Issue date Jul 14, 1992
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Selected-exponent signature systems
- Patent number 4,996,711
- Issue date Feb 26, 1991
- David L. Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Unpredictable blind signature systems
- Patent number 4,991,210
- Issue date Feb 5, 1991
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
One-show blind signature systems
- Patent number 4,987,593
- Issue date Jan 22, 1991
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Returned-value blind signature systems
- Patent number 4,949,380
- Issue date Aug 14, 1990
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Undeniable signature systems
- Patent number 4,947,430
- Issue date Aug 7, 1990
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Card-computer moderated systems
- Patent number 4,926,480
- Issue date May 15, 1990
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
One-show blind signature systems
- Patent number 4,914,698
- Issue date Apr 3, 1990
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Blind signature systems
- Patent number 4,759,063
- Issue date Jul 19, 1988
- David L. Chaum
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
DIGITAL CURRENCY
- Publication number 20250013995
- Publication date Jan 9, 2025
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
PRECOMPUTED AND TRANSACTIONAL MIXING
- Publication number 20240056431
- Publication date Feb 15, 2024
- DIGITAL COMMUNITY LLC
- David CHAUM
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
MULTI-PARTY AND MULTI-USE QUANTUM RESISTANT SIGNATURES AND KEY ESTA...
- Publication number 20230006836
- Publication date Jan 5, 2023
- William CARTER
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
RANDOM SAMPLE ELECTIONS
- Publication number 20220366751
- Publication date Nov 17, 2022
- DIGITAL COMMUNITY LLC
- David CHAUM
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
COMPUTATION MIXING
- Publication number 20220076253
- Publication date Mar 10, 2022
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
PRECOMPUTED AND TRANSACTIONAL MIXING
- Publication number 20220078172
- Publication date Mar 10, 2022
- DIGITAL COMMUNITY LLC
- David CHAUM
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
CRYPTOGRAPHIC PHYSICAL RANDOM OBJECT
- Publication number 20220027912
- Publication date Jan 27, 2022
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
PRECOMPUTED AND TRANSACTIONAL MIXING
- Publication number 20190297062
- Publication date Sep 26, 2019
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
RANDOM SAMPLE ELECTIONS
- Publication number 20190005756
- Publication date Jan 3, 2019
- David Chaum
- G07 - CHECKING-DEVICES
Information Patent Application
PRECOMPUTED AND TRANSACTIONAL MIXING
- Publication number 20180139190
- Publication date May 17, 2018
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
RANDOM SAMPLE ELECTIONS
- Publication number 20170200338
- Publication date Jul 13, 2017
- David Chaum
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
NEAR TO EYE DISPLAY AND APPLIANCE
- Publication number 20150277123
- Publication date Oct 1, 2015
- David CHAUM
- G02 - OPTICS
Information Patent Application
RANDOM SAMPLE ELECTIONS
- Publication number 20140172517
- Publication date Jun 19, 2014
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
HIDDEN-CODE VOTING AND MARKING SYSTEMS
- Publication number 20120132713
- Publication date May 31, 2012
- David CHAUM
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Application
Near to Eye Display System and Appliance
- Publication number 20100149073
- Publication date Jun 17, 2010
- David Chaum
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
SYSTEM AND APPARATUS FOR EYEGLASS APPLIANCE PLATFORM
- Publication number 20100110368
- Publication date May 6, 2010
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
VIDEO COPY PREVENTION SYSTEMS WITH INTERACTION AND COMPRESSION
- Publication number 20100061553
- Publication date Mar 11, 2010
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Hidden-code voting and marking systems
- Publication number 20090308922
- Publication date Dec 17, 2009
- David Chaum
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Application
Scan-integrity election systems
- Publication number 20080272194
- Publication date Nov 6, 2008
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Ballot integrity systems
- Publication number 20070095909
- Publication date May 3, 2007
- David Chaum
- G07 - CHECKING-DEVICES
Information Patent Application
Distributed communication security systems
- Publication number 20060218636
- Publication date Sep 28, 2006
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Wine vessel system
- Publication number 20060191419
- Publication date Aug 31, 2006
- Edward Storm Spoljaric
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Application
Electronic lock that can learn to recognize any ordinary key
- Publication number 20030205070
- Publication date Nov 6, 2003
- David Chaum
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Application
Secret-ballot systems with voter-verifiable integrity
- Publication number 20030158775
- Publication date Aug 21, 2003
- David Chaum
- G07 - CHECKING-DEVICES
Information Patent Application
Random number generator security systems
- Publication number 20030104859
- Publication date Jun 5, 2003
- David Chaum
- G07 - CHECKING-DEVICES
Information Patent Application
Multi-purpose transaction card system
- Publication number 20030097344
- Publication date May 22, 2003
- David Chaum
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Physical and digital secret ballot systems
- Publication number 20010034640
- Publication date Oct 25, 2001
- David Chaum
- G07 - CHECKING-DEVICES

David Chaum

Person

Patents Grantslast 30 patents

Random sample elections

Precomputed and transactional mixing

Video copy prevention systems with interaction and compression

Precomputed and transactional mixing

Random sample elections

Scan-integrity election systems

Hidden-code voting and marking systems

Ballot integrity systems

Secret-ballot systems with voter-verifiable integrity

Multi-purpose transaction card system

Multi-purpose transaction card system

Electronic lock that can learn to recognize any ordinary key

Partitioned information storage systems with controlled retrieval

Limited-traceability systems

Limited-traceability systems

Limited-traceability systems

Private signature and proof systems

Automatic real-time highway toll collection from moving vehicles

Compact endorsement signature systems

Desinated-confirmer signature systems

Optionally moderated transaction systems

Optionally moderated transaction systems

Selected-exponent signature systems

Unpredictable blind signature systems

One-show blind signature systems

Returned-value blind signature systems

Undeniable signature systems

Card-computer moderated systems

One-show blind signature systems

Blind signature systems

Patents Applicationslast 30 patents

DIGITAL CURRENCY

PRECOMPUTED AND TRANSACTIONAL MIXING

MULTI-PARTY AND MULTI-USE QUANTUM RESISTANT SIGNATURES AND KEY ESTA...

RANDOM SAMPLE ELECTIONS

COMPUTATION MIXING

PRECOMPUTED AND TRANSACTIONAL MIXING

CRYPTOGRAPHIC PHYSICAL RANDOM OBJECT

PRECOMPUTED AND TRANSACTIONAL MIXING

RANDOM SAMPLE ELECTIONS

PRECOMPUTED AND TRANSACTIONAL MIXING

RANDOM SAMPLE ELECTIONS

NEAR TO EYE DISPLAY AND APPLIANCE

RANDOM SAMPLE ELECTIONS

HIDDEN-CODE VOTING AND MARKING SYSTEMS

Near to Eye Display System and Appliance

SYSTEM AND APPARATUS FOR EYEGLASS APPLIANCE PLATFORM

VIDEO COPY PREVENTION SYSTEMS WITH INTERACTION AND COMPRESSION

Hidden-code voting and marking systems

Scan-integrity election systems

Ballot integrity systems

Distributed communication security systems

Wine vessel system

Electronic lock that can learn to recognize any ordinary key

Secret-ballot systems with voter-verifiable integrity

Random number generator security systems

Multi-purpose transaction card system

Physical and digital secret ballot systems