Means structurally associated with the lamp for indicating defects or previous use

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Patents Grantslast 30 patents

Information Patent Grant
Lamp lighting device and filament lamp
- Patent number 8,476,848
- Issue date Jul 2, 2013
- Ushio Denki Kabushiki Kaisha
- Shinji Taniguchi
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
3801860
- Patent number 3,801,860
- Issue date Apr 2, 1974
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
3725728
- Patent number 3,725,728
- Issue date Apr 3, 1973
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
2736884
- Patent number 2,736,884
- Issue date Feb 28, 1956
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
2332116
- Patent number 2,332,116
- Issue date Oct 19, 1943
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...