Granted Patent
Utility
US 5,477,784 · App. 08/258,794
Apparatus and method for printing on and polarizing polymer electret film
Inventor:
Jack E. Floegel
Patented Case
View Patent ↗
Granted: Dec 26, 1995
Filed: Jun 13, 1994
Inventor
Jack E. Floegel
Assignee (at issue)
Permacharge 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.