Granted Patent
Utility
US 4,175,853 · App. 05/881,422
Photographic printer with dichroic filter reset indicators
Inventor:
Ronald B. Harvey
Patented Case
View Patent ↗
Granted: Nov 27, 1979
Filed: Feb 27, 1978
Inventor
Ronald B. Harvey
Assignee (at issue)
Pako 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.