Granted Patent
Utility
US 4,199,265 · App. 05/955,970
Motorless magnetically coupled stirrer
Inventors:
Robert A. Sanderson, Patrick S. Chan
Patented Case
View Patent ↗
Granted: Apr 22, 1980
Filed: Oct 30, 1978
Inventors
Robert A. Sanderson
Patrick S. Chan
Assignee (at issue)
American Hospital Supply Corp.
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.