Granted Patent
Utility
US 6,012,905 · App. 09/030,251
Suction and discharge valve mechanism for fluid displacement apparatus
Inventors:
Mitsuhiro Takashima, Yujiro Morita
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Feb 25, 1998
Inventors
Mitsuhiro Takashima
Yujiro Morita
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.