Granted Patent
Utility
US 4,808,045 · App. 02/266,339
End mill with throw-away tip
Inventors:
Osamu Tsujimura, Takayoshi Saito, Tatsuo Arai, Yasuzo Funaki
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Jun 23, 1987
Inventors
Osamu Tsujimura
Takayoshi Saito
Tatsuo Arai
Yasuzo Funaki
Assignee (at issue)
Mitsubishi Kinzoku Kabushiki Kaisha
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.