Automatic control for sprinkler systems
United States Patent 3309543
US Patent References:
Timing control units
- - 3200303


Inventors:
Alston, Russell M.
SHARP CARL R
Publication Date:
03/14/1967
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Assignee:
Rain, Bird Sprinkler Mfg
Primary Class:
307/141.400
Other Classes:
307/41, 968/618, 361/166
International Classes:
G04C23/26; G05B19/10; G04C23/00; G05B19/04