Thermionic-cathode tubes

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Patents Grantslast 30 patents

Information Patent Grant
Thermo-quiescent reservoir system for a gaseous-discharge device
- Patent number 5,994,661
- Issue date Nov 30, 1999
- Litton Systems, Inc.
- Ralph Dean Schafer
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
2416927
- Patent number 2,416,927
- Issue date Mar 4, 1947
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
2217186
- Patent number 2,217,186
- Issue date Oct 8, 1940
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
2201819
- Patent number 2,201,819
- Issue date May 21, 1940
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
2179601
- Patent number 2,179,601
- Issue date Nov 14, 1939
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
2034148
- Patent number 2,034,148
- Issue date Mar 17, 1936
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
1962158
- Patent number 1,962,158
- Issue date Jun 12, 1934
- H01 - BASIC ELECTRIC ELEMENTS