71674608
Oct 11, 1954
Dec 13, 1955
IRRIGATION DEVICES, MORE SPECIFICALLY: IRRIGATION SYSTEMS INCLUDING SOIL MOISTURE SENSING DEVICES FOR INITIATING AND TERMINATING IRRIGATION CYCLES, PROGRAM TIMERS FOR CONTROLLING A SERIES OF IRRIGATION OUTLETS, VACUUM RESPONSIVE VALVES AND REMOTE CONTROL VALVES, AND OTHER COMPONENTS OF IRRIGATION SYSTEMS
Firearms