Douglas Roberts

Person

Bellevue, WA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Electric- or magnetic-field based detection of when electrode pads...
- Patent number 8,463,405
- Issue date Jun 11, 2013
- Koninklijke Philips Electronics N.V.
- Douglas Roberts
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Communication method for vacuum tube replacement devices
- Patent number 8,335,326
- Issue date Dec 18, 2012
- Brett A. Hertzberg
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Expanded performance and functions for vacuum tube replacement devices
- Patent number 7,482,863
- Issue date Jan 27, 2009
- Roberts Retrovalve, Inc.
- Douglas H. Roberts
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Vacuum tube replacement device, circuit and system
- Patent number 7,408,401
- Issue date Aug 5, 2008
- Roberts Retrovalve, Inc.
- Douglas H. Roberts
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Indicators for vacuum tube replacement devices
- Patent number 7,286,060
- Issue date Oct 23, 2007
- Roberts Retrovalve, Inc.
- Douglas H. Roberts
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Circuitry for dynamically controlling capacitor charge based on bat...
- Patent number 5,889,388
- Issue date Mar 30, 1999
- Heartstream, Inc.
- David B. Cameron
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Dynamic load controller for a battery
- Patent number 5,773,961
- Issue date Jun 30, 1998
- Heartstream, Inc.
- David B. Cameron
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
Communication Method for Vacuum Tube Replacement Devices
- Publication number 20080260183
- Publication date Oct 23, 2008
- Brett A. Hertzberg
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
VACUUM TUBE REPLACEMENT DEVICE, CIRCUIT AND SYSTEM
- Publication number 20080204131
- Publication date Aug 28, 2008
- Douglas H. Roberts
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Electric- or Magnetic-Field Based Detection of when Electrode Pads...
- Publication number 20080140171
- Publication date Jun 12, 2008
- Koninklijke Philips Electrics N.V.
- Douglas Roberts
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Expanded Performance and Functions for Vacuum Tube Replacement Devices
- Publication number 20070285156
- Publication date Dec 13, 2007
- Roberts Retrovalve, Inc.
- Douglas H. Roberts
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Indicators for vacuum tube replacement devices
- Publication number 20070035408
- Publication date Feb 15, 2007
- Douglas H. Roberts
- H03 - BASIC ELECTRONIC CIRCUITRY

Douglas Roberts

Person

Patents Grantslast 30 patents

Electric- or magnetic-field based detection of when electrode pads...

Communication method for vacuum tube replacement devices

Expanded performance and functions for vacuum tube replacement devices

Vacuum tube replacement device, circuit and system

Indicators for vacuum tube replacement devices

Circuitry for dynamically controlling capacitor charge based on bat...

Dynamic load controller for a battery

Patents Applicationslast 30 patents

Communication Method for Vacuum Tube Replacement Devices

VACUUM TUBE REPLACEMENT DEVICE, CIRCUIT AND SYSTEM

Electric- or Magnetic-Field Based Detection of when Electrode Pads...

Expanded Performance and Functions for Vacuum Tube Replacement Devices

Indicators for vacuum tube replacement devices