Granted Patent
Utility
US 5,463,810 · App. 08/140,490
Method of manufacturing plunger barrel
Inventors:
Toshihiro Nakagawa, Toshiaki Sakai, Hiroaki Nozaki
Patented Case
View Patent ↗
Granted: Nov 7, 1995
Filed: Oct 25, 1993
Inventors
Toshihiro Nakagawa
Toshiaki Sakai
Hiroaki Nozaki
Assignee (at issue)
Zexel GmbH
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.