Granted Patent
Utility
US 4,484,469 · App. 06/492,628
Luminosity probe with positively retained light pipe
Inventors:
Donald D. Grover, Ralph Mueller
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: May 9, 1983
Inventors
Donald D. Grover
Ralph Mueller
Assignee (at issue)
Snap-on Tools Company
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.