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TIME PROPORTIONING TEMPERATURE CONTROL SYSTEM
US 3,443,121 A
Filed
: 12/20/1965
Issued
: 05/06/1969
Est. Priority Date
: 12/20/1965
Status: Expired due to Term
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Current Assignee
Stephen P. Weisbrod
Original Assignee
Stephen P. Weisbrod
Inventors
Weisbrod, Stephen P.
Application Number
US04/515,116
Time in Patent Office
1,233 Days
Field of Search
US Class Current
307/117
CPC Class Codes
G05B 11/28
using pulse-height modulati...
G05D 23/1913
delivering a series of pulses
G05D 23/22
the sensing element being a...
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