Granted Patent
Utility
US 4,698,284 · App. 06/791,256
Device for aligning a photomask onto a printed wiring board
Inventor:
John V. Cronin
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: Oct 25, 1985
Inventor
John V. Cronin
Assignee (at issue)
M&T Chemicals, 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.