Granted Patent
Utility
US 5,379,790 · App. 07/848,424
Variable restriction
Inventors:
Mark L. Bruce, Douglas J. Keebler
Patented Case
View Patent ↗
Granted: Jan 10, 1995
Filed: Mar 6, 1992
Inventors
Mark L. Bruce
Douglas J. Keebler
Assignee (at issue)
Suprex 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.