USD316540SExpiredUtility

Push button switch

77
Assignee: NIHON KAIHEIKI IND CO LTDPriority: Dec 21, 1988Filed: Mar 31, 1989Granted: Apr 30, 1991
Est. expiryDec 21, 2008(expired)· nominal 20-yr term from priority
Inventors:Kenichi Hirose
77
PatentIndex Score
16
Cited by
7
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a push button switch, as shown and described.

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