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electronic circuits
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Letter to James Shanahan from Hugh Drake Re: General Electric Home Sentry Smoke Alarm
Papers Regarding the Plans and Reveal of the battery powered smoke detector and batter...
Letter to James Shanahan from Hugh Drake Re: Hot Wire Detector Patent Application
Patent Correspondence Re: Patent Application 698,055
Addendum #2 to Agreement dated April 3, 1970 Re: Battery and Line Powered Residential ...
United States Patent 3,731,093
Amendment addressed to the Commissioner of Patents by Hugh Drake on behalf of Lyman Bl...
Letter to William Meserole, Esq. from Hugh Drake Re: Blackwell Application Serial No. ...
United States Patent 3,728,615
Letter to Paul Staby from Duane Pearsall Re:Agreement to wave the Engineering Employme...
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MS55: Duane D. Pearsall Papers
44
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Current results range from
1966
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1986
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Creator
Drake, Hugh
3
Pearsall, Duane
2
Statitrol Corporation
40
Trademark Journal
1
U.S. Patent Office
2
Resource type
Other
44
License
https://creativecommons.org/licenses/by-nc/4.0/
44