Granted Patent
Utility
US 6,370,781 · App. 09/438,296
Reciprocating tool
Inventor:
Yasuo Sasaki
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: Nov 12, 1999
Inventor
Yasuo Sasaki
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.