USD310936SExpiredUtility

Power hammer drill

77
Assignee: RYOBI LTDPriority: Sep 9, 1987Filed: Mar 8, 1988Granted: Oct 2, 1990
Est. expirySep 9, 2007(expired)· nominal 20-yr term from priority
Inventors:Toshiaki SaitoShintaro Hara
77
PatentIndex Score
16
Cited by
4
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a power hammer drill, as shown.

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