Granted Patent
Utility
US 4,369,899 · App. 06/207,892
Down-locking pump
Inventors:
Wallace F. Magers, Donald D. Foster
Patented Case
View Patent ↗
Granted: Jan 25, 1983
Filed: Nov 18, 1980
Inventors
Wallace F. Magers
Donald D. Foster
Assignee (at issue)
Realex 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.