Granted Patent
Utility
US 4,483,665 · App. 06/340,644
Bellows-type pump and metering system
Inventor:
Hugo Hauser
Patented Case
View Patent ↗
Granted: Nov 20, 1984
Filed: Jan 19, 1982
Inventor
Hugo Hauser
Assignee (at issue)
Tri-Tec Industries 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.