Granted Patent
Utility
US 4,647,524 · App. 06/736,380
Transferring polymer from thin plastic films to photodevelop insulation patterns on printed wiring boards
Inventor:
Donald F. Sullivan
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Jun 19, 1985
Inventor
Donald F. Sullivan
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.