PATTERN PRODUCING SWITCHING DEVICE
United States Patent 3433188
Inventors:
Pickles, Norman
Publication Date:
03/18/1969
Assignee:
Blackburn, Electronic Prod
Other Classes:
340/825.220, 200/19.060
International Classes:
D03C3/20; G05B19/12; D03C3/00; G05B19/04; D05C15/26; H01H41/00