Granted Patent
Utility
US 5,027,151 · App. 07/568,153
Film transparency holder
Inventor:
Robert W. Rayner
Patented Case
View Patent ↗
Granted: Jun 25, 1991
Filed: Aug 16, 1990
Inventor
Robert W. Rayner
Assignee (at issue)
Crosfield Electronics Limited
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.