Granted Patent
Utility
US 4,412,793 · App. 06/315,924
Pump including locking means for a flexible tube
Inventors:
Kaj O. Stenberg, Lars Nystrom
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Oct 28, 1981
Inventors
Kaj O. Stenberg
Lars Nystrom
Assignee (at issue)
Cambro Lundia AB
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.