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Automatic watering control
US 2,768,028 A
Filed
: 03/24/1955
Issued
: 10/23/1956
Est. Priority Date
: 03/24/1955
Status: Expired due to Term
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Current Assignee
Donald E. Robinson
Original Assignee
Donald E. Robinson
Inventors
Robinson, Donald E.
Application Number
US03/496,387
Time in Patent Office
579 Days
Field of Search
US Class Current
137/78.3
CPC Class Codes
A01G 25/167
Control by humidity of the ...
Y10T 137/189
Soil moisture sensing
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