Granted Patent
Utility
US 5,620,441 · App. 08/260,084
Smoke evacuator remote on/off switch apparatus and method
Inventors:
Richard J. Greff, David Tung
Patented Case
View Patent ↗
Granted: Apr 15, 1997
Filed: Jun 15, 1994
Inventors
Richard J. Greff
David Tung
Assignee (at issue)
Stackhouse, Inc.
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.