Granted Patent
Utility
US 4,978,892 · App. 07/289,693
Variable color-output strobe
Inventors:
Stephanie Petrakos, John P. Gaewsky
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Dec 27, 1988
Inventors
Stephanie Petrakos
John P. Gaewsky
Assignee (at issue)
Polaroid 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.