Granted Patent
Utility
US 5,355,291 · App. 07/961,262
Internally illuminated sign
Inventors:
Gregory J. Subisak, Douglas S. Hammond
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: Oct 15, 1992
Inventors
Gregory J. Subisak
Douglas S. Hammond
Assignee (at issue)
Holophane Lighting, Inc.
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.