Ball end mill Patent Grant Tsujimura , et al. June 26, 1 [Mitsubishi Kinzoku Kabushiki Kaisha]

Ball end mill

Tsujimura , et al. June 26, 1

Patent Grant D308874

U.S. patent number D308,874 [Application Number 07/181,152] was granted by the patent office on 1990-06-26 for ball end mill. This patent grant is currently assigned to Mitsubishi Kinzoku Kabushiki Kaisha. Invention is credited to Tatsuo Arai, Masayuki Okawa, Osamu Tsujimura.

United States Patent	D308,874
Tsujimura , et al.	June 26, 1990

Ball end mill

Claims

The ornamental design for a ball and mill, as shown.

Inventors:	Tsujimura; Osamu (Kawasaki, JP), Arai; Tatsuo (Kitamoto, JP), Okawa; Masayuki (Kawasaki, JP)
Assignee:	Mitsubishi Kinzoku Kabushiki Kaisha (Tokyo, JP)
Appl. No.:	07/181,152
Filed:	April 13, 1988

Foreign Application Priority Data


Oct 15, 1987 [JP]			62-42121

Current U.S. Class:	D15/139; 407/40; 407/54
Field of Search:	;D15/138,139,140 ;407/40,42,54 ;408/239A,239R,187,700,713,223,224,227,229,233,199

References Cited [Referenced By]

U.S. Patent Documents


4252480	February 1981	Mizuno et al.
4265574	May 1981	Eckle
4527930	July 1985	Harroun
4564321	January 1986	Kondo et al.
4566827	January 1986	Neumueller
4585375	April 1986	Erkfritz
4588331	May 1986	Yoshinori
4618296	October 1986	Allaire et al.

Primary Examiner: Holtje; Nelson C.
Assistant Examiner: Asch; Jeffrey
Attorney, Agent or Firm: Cushman, Darby & Cushman

Description

FIG. 1 is a front elevational view of a ball end mill showing our new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view; and,

FIG. 7 is a front and left side perspective view thereof.

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