Granted Patent
Utility
US 5,305,231 · App. 07/835,627
Multiple K factor, selectable gas detector
Inventors:
Mark J. Coppler, Robert L. Novack, John E. Tozier, Peter M. Noble
Patented Case
View Patent ↗
Granted: Apr 19, 1994
Filed: Feb 13, 1992
Inventors
Mark J. Coppler
Robert L. Novack
John E. Tozier
Peter M. Noble
Assignee (at issue)
BACHARACH, 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.