John P. Wren

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Swindon, GB

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Patents Grantslast 30 patents

Information Patent Grant
Electrical control system for the movement of the pickup arm of a d...
- Patent number 4,184,687
- Issue date Jan 22, 1980
- Plessey Handel und Investments AG
- John P. Wren
- G11 - INFORMATION STORAGE
Information Patent Grant
Disc-record players
- Patent number 4,143,879
- Issue date Mar 13, 1979
- Plessey Handel und Investments AG
- John P. Wren
- G11 - INFORMATION STORAGE