Granted Patent
Utility
US 6,192,315 · App. 08/884,454
Dual-calibrated compass
Inventors:
James R. Geschke, Thomas R. Olson, Mark Michmerhuizen, Gregory B. Colon
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Jun 27, 1997
Inventors
James R. Geschke
Thomas R. Olson
Mark Michmerhuizen
Gregory B. Colon
Assignee (at issue)
Prince 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.