USD308874SExpiredUtility

Ball end mill

79
Assignee: MITSUBISHI METAL CORPPriority: Oct 15, 1987Filed: Apr 13, 1988Granted: Jun 26, 1990
Est. expiryOct 15, 2007(expired)· nominal 20-yr term from priority
Inventors:Osamu TsujimuraTatsuo AraiMasayuki Okawa
79
PatentIndex Score
17
Cited by
8
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a ball and mill, as shown.

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