David L. HOFELDT

Person

Oakdale, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Methods and systems for blown film thickness measurement
- Patent number 12,123,700
- Issue date Oct 22, 2024
- 3M Innovative Properties Company
- Thomas J. Strey
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Time-domain terahertz measurement system having a single reference...
- Patent number 11,143,590
- Issue date Oct 12, 2021
- 3M Innovative Properties Company
- David L. Hofeldt
- G01 - MEASURING TESTING
Information Patent Grant
Precision control of web material having micro-replicated lens array
- Patent number 9,977,154
- Issue date May 22, 2018
- 3M Innovative Properties Company
- David L. Hofeldt
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
System for detection of non-uniformities in web-based materials
- Patent number 9,002,072
- Issue date Apr 7, 2015
- 3M Innovative Properties Company
- Catherine P. Tarnowski
- G01 - MEASURING TESTING
Information Patent Grant
Computer-aided assignment of ratings to digital samples of a manufa...
- Patent number 8,965,116
- Issue date Feb 24, 2015
- 3M Innovative Properties Company
- Evan J. Ribnick
- G01 - MEASURING TESTING
Information Patent Grant
Method and apparatus for photoimaging a substrate
- Patent number 8,339,573
- Issue date Dec 25, 2012
- 3M Innovative Properties Company
- Daniel J. Theis
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Optical property sensor
- Patent number 7,969,560
- Issue date Jun 28, 2011
- 3M Innovative Properties Company
- Gregory D. Kostuch
- G01 - MEASURING TESTING
Information Patent Grant
Web inspection calibration system and related methods
- Patent number 7,957,000
- Issue date Jun 7, 2011
- 3M Innovative Properties Company
- David L. Hofeldt
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Web inspection calibration system and related methods
- Patent number 7,773,226
- Issue date Aug 10, 2010
- 3M Innovative Properties Company
- David L. Hofeldt
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
LED modifying apparatus and method
- Patent number 7,202,490
- Issue date Apr 10, 2007
- 3M Innovative Properties Company
- Francis M. Aguirre
- F21 - LIGHTING
Information Patent Grant
LED modifying apparatus and method
- Patent number 7,189,983
- Issue date Mar 13, 2007
- 3M Innovative Properties Company
- Francis M. Aguirre
- F21 - LIGHTING

Patents Applicationslast 30 patents

Information Patent Application
METHODS AND SYSTEMS FOR MEASUREMENT AND CONTROL OF CIRCUMFERENTIAL...
- Publication number 20230219274
- Publication date Jul 13, 2023
- 3M Innovative Properties Company
- William W. Merrill
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
METHODS AND SYSTEMS FOR BLOWN FILM THICKNESS MEASUREMENT
- Publication number 20220412723
- Publication date Dec 29, 2022
- 3M Innovative Properties Company
- Thomas J. Strey
- G01 - MEASURING TESTING
Information Patent Application
METHOD AND SYSTEM FOR CHARACTERIZING SURFACE UNIFORMITY
- Publication number 20220011238
- Publication date Jan 13, 2022
- 3M Innovative Properties Company
- Francis T. Caruso
- G01 - MEASURING TESTING
Information Patent Application
TIME-DOMAIN TERAHERTZ MEASUREMENT SYSTEM HAVING A SINGLE REFERENCE...
- Publication number 20200408678
- Publication date Dec 31, 2020
- 3M Innovative Properties Company
- David L. Hofeldt
- G01 - MEASURING TESTING
Information Patent Application
METHOD AND APPARATUS FOR MEASURING THE THREE DIMENSIONAL STRUCTURE...
- Publication number 20150009301
- Publication date Jan 8, 2015
- 3M Innovative Properties Company
- Evan J. Ribnick
- G01 - MEASURING TESTING
Information Patent Application
SENSOR FOR MEASURING SURFACE NON-UNIFORMITY
- Publication number 20140362371
- Publication date Dec 11, 2014
- Yi Qiao
- G01 - MEASURING TESTING
Information Patent Application
LINEWIDTH MEASUREMENT SYSTEM
- Publication number 20140240720
- Publication date Aug 28, 2014
- Yi Qiao
- G01 - MEASURING TESTING
Information Patent Application
SYSTEM FOR DETECTION OF NON-UNIFORMITIES IN WEB-BASED MATERIALS
- Publication number 20130322733
- Publication date Dec 5, 2013
- 3M Innovative Properties Company
- Catherine P. Tarnowski
- G01 - MEASURING TESTING
Information Patent Application
CONTINUOUS CHARTING OF NON-UNIFORMITY SEVERITY FOR DETECTING VARIAB...
- Publication number 20130208978
- Publication date Aug 15, 2013
- 3M Innovative Properties Company
- Evan J. Ribnick
- G01 - MEASURING TESTING
Information Patent Application
COMPUTER-AIDED ASSIGNMENT OF RATINGS TO DIGITAL SAMPLES OF A MANUFA...
- Publication number 20130202200
- Publication date Aug 8, 2013
- 3M INNOVATIVE PROPERTIES COMPANY
- Evan J. Ribnick
- G01 - MEASURING TESTING
Information Patent Application
HIGH RESOLUTION AUTOFOCUS INSPECTION SYSTEM
- Publication number 20130113919
- Publication date May 9, 2013
- 3M Innovative Properties Company
- Yi Qiao
- G01 - MEASURING TESTING
Information Patent Application
Precision Control of Web Material having Micro-replicated Lens Array
- Publication number 20130009329
- Publication date Jan 10, 2013
- David L. Hofeldt
- G02 - OPTICS
Information Patent Application
METHOD AND APPARATUS FOR PHOTOIMAGING A SUBSTRATE
- Publication number 20100304309
- Publication date Dec 2, 2010
- Daniel J. Theis
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
WEB INSPECTION CALIBRATION SYSTEM AND RELATED METHODS
- Publication number 20100231897
- Publication date Sep 16, 2010
- 3M Innovative Properties Company
- David L. HOFELDT
- G01 - MEASURING TESTING
Information Patent Application
OPTICAL PROPERTY SENSOR
- Publication number 20100188651
- Publication date Jul 29, 2010
- Gregory D. Kostuch
- G01 - MEASURING TESTING
Information Patent Application
WEB INSPECTION CALIBRATION SYSTEM AND RELATED METHODS
- Publication number 20090303484
- Publication date Dec 10, 2009
- 3M Innovative Properties Company
- David L. HOFELDT
- G01 - MEASURING TESTING
Information Patent Application
LED modifying apparatus and method
- Publication number 20050116179
- Publication date Jun 2, 2005
- 3M Innovative Properties Company
- Francis M. Aguirre
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
LED modifying apparatus and method
- Publication number 20050116178
- Publication date Jun 2, 2005
- 3M Innovative Properties Company
- Francis M. Aguirre
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

David L. HOFELDT

Person

Patents Grantslast 30 patents

Methods and systems for blown film thickness measurement

Time-domain terahertz measurement system having a single reference...

Precision control of web material having micro-replicated lens array

System for detection of non-uniformities in web-based materials

Computer-aided assignment of ratings to digital samples of a manufa...

Method and apparatus for photoimaging a substrate

Optical property sensor

Web inspection calibration system and related methods

Web inspection calibration system and related methods

LED modifying apparatus and method

LED modifying apparatus and method

Patents Applicationslast 30 patents

METHODS AND SYSTEMS FOR MEASUREMENT AND CONTROL OF CIRCUMFERENTIAL...

METHODS AND SYSTEMS FOR BLOWN FILM THICKNESS MEASUREMENT

METHOD AND SYSTEM FOR CHARACTERIZING SURFACE UNIFORMITY

TIME-DOMAIN TERAHERTZ MEASUREMENT SYSTEM HAVING A SINGLE REFERENCE...

METHOD AND APPARATUS FOR MEASURING THE THREE DIMENSIONAL STRUCTURE...

SENSOR FOR MEASURING SURFACE NON-UNIFORMITY

LINEWIDTH MEASUREMENT SYSTEM

SYSTEM FOR DETECTION OF NON-UNIFORMITIES IN WEB-BASED MATERIALS

CONTINUOUS CHARTING OF NON-UNIFORMITY SEVERITY FOR DETECTING VARIAB...

COMPUTER-AIDED ASSIGNMENT OF RATINGS TO DIGITAL SAMPLES OF A MANUFA...

HIGH RESOLUTION AUTOFOCUS INSPECTION SYSTEM

Precision Control of Web Material having Micro-replicated Lens Array

METHOD AND APPARATUS FOR PHOTOIMAGING A SUBSTRATE

WEB INSPECTION CALIBRATION SYSTEM AND RELATED METHODS

OPTICAL PROPERTY SENSOR

WEB INSPECTION CALIBRATION SYSTEM AND RELATED METHODS

LED modifying apparatus and method

LED modifying apparatus and method