Granted Patent
Utility
US 5,921,273 · App. 08/834,592
Delivery valve assembly for compressor
Inventors:
Mitsuya Ono, Katsumi Sakamoto, Nobuyuki Nakajima, Toshihiro Murayama, Shunji Muta, Tomoyasu Takahashi, Susumu Makihira
Patented Case
View Patent ↗
Granted: Jul 13, 1999
Filed: Apr 7, 1997
Inventors
Mitsuya Ono
Katsumi Sakamoto
Nobuyuki Nakajima
Toshihiro Murayama
Shunji Muta
Tomoyasu Takahashi
Susumu Makihira
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.