Alan G. Chalmers

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London, GB

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Patents Grantslast 30 patents

Information Patent Grant
Electric discharge devices
- Patent number RE30831
- Issue date Dec 22, 1981
- Thorn EMI Limited
- Alan G. Chalmers
- 313 - Electric lamp and discharge devices
Information Patent Grant
Electrical discharge lamp
- Patent number 4,135,110
- Issue date Jan 16, 1979
- Thorn Electrical Industries Limited
- Alan G. Chalmers
- H01 - BASIC ELECTRIC ELEMENTS