Granted Patent
Utility
US 6,026,721 · App. 08/766,797
Method for manufacturing valve discs of fluid displacement apparatus
Inventor:
Isamu Fukai
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Dec 13, 1996
Inventor
Isamu Fukai
Assignee (at issue)
SANDEN CORPORATION
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.