Brett A. Hertzberg

Follow

Person

Bellevue, WA, US

People

Patents Grantslast 30 patents

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
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

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
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