John L. Plumb

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Danvers, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Mercury and lead free high pressure sodium lamp
- Patent number 6,268,696
- Issue date Jul 31, 2001
- Osram Sylvania Inc.
- Robert B. Dolan
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vapor discharge device with electron emissive material
- Patent number 5,111,108
- Issue date May 5, 1992
- GTE Products Corporation
- David A. Goodman
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Frequency/sensitive switching circuit
- Patent number 4,229,681
- Issue date Oct 21, 1980
- GTE Products Corporation
- John L. Plumb
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Isolator circuit for use with frequency sensitive switching circuit
- Patent number 4,190,790
- Issue date Feb 26, 1980
- GTE Sylvania Incorporated
- John L. Plumb
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Frequency sensitive switching circuit
- Patent number 4,169,259
- Issue date Sep 25, 1979
- GTE Sylvania Incorporated
- Henry T. Hidler
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER