Granted Patent
Utility
US 4,879,546 · App. 07/344,422
Ultrasonic hand-held refrigerant leak detector
Inventors:
Byron J. Dunham, Gary P. Murray, Don A. Bulla
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Apr 26, 1989
Inventors
Byron J. Dunham
Gary P. Murray
Don A. Bulla
Assignee (at issue)
Kent-Moore 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.