James McCrink

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Lisle, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Smoke detector having variable level sensitivity
- Patent number RE33920
- Issue date May 12, 1992
- Seatt Corporation
- William P. Tanguay
- 340 - Communications: electrical
Information Patent Grant
Smoke detector having variable level sensitivity
- Patent number 4,792,797
- Issue date Dec 20, 1988
- Seatt Corporation
- William P. Tanguay
- G08 - SIGNALLING