John Wright

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Barnes, GB

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Patents Grantslast 30 patents

Information Patent Grant
Electric lighting and power controllers therefor
- Patent number 5,237,244
- Issue date Aug 17, 1993
- David R. Bertenshaw
- G05 - CONTROLLING REGULATING
Information Patent Grant
Electric lighting and power controllers therefor
- Patent number 5,066,896
- Issue date Nov 19, 1991
- Strand Lighting Limited
- David R. Bertenshaw
- G05 - CONTROLLING REGULATING
Information Patent Grant
Interference suppression for semi-conducting switching devices
- Patent number 4,933,804
- Issue date Jun 12, 1990
- The Rank Organisation PLC
- David R. Bertenshaw
- H01 - BASIC ELECTRIC ELEMENTS