USD342878SExpiredUtility

Portable electric hammer drill

91
Assignee: RYOBI LTDPriority: May 7, 1991Filed: Nov 6, 1991Granted: Jan 4, 1994
Est. expiryMay 7, 2011(expired)· nominal 20-yr term from priority
Inventors:Satoru WatanabeMasakazu Sakamoto
91
PatentIndex Score
38
Cited by
6
References
1
Claims

Claims

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

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