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Douglas, EN
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Patents Grants
last 30 patents
Information
Patent Grant
Toothbrush assembly
Patent number
5,369,835
Issue date
Dec 6, 1994
Delphic Inc
A. R. Hyde Clarke
A46 - BRUSHWARE
Information
Patent Grant
Plural sensor monitoring and display device
Patent number
4,092,642
Issue date
May 30, 1978
Delphic Limited
Douglas Harry Green
G08 - SIGNALLING
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