Granted Patent
Utility
US 6,026,713 · App. 09/106,713
Pneumatically operated screw driver
Inventors:
Yasuki Ohmori, Yasuo Sasaki, Mitsuo Ogura, Michio Wakabayashi, Akira Uno, Hiroyasu Ishikawa
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Jun 29, 1998
Inventors
Yasuki Ohmori
Yasuo Sasaki
Mitsuo Ogura
Michio Wakabayashi
Akira Uno
Hiroyasu Ishikawa
Assignee (at issue)
Hitachi Koki Co., Ltd.
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.