Granted Patent
Utility
US 4,914,522 · App. 07/343,917
Reproduction and enlarging imaging system and method using a pulse-width modulated air stream
Inventors:
Peter L. Duffield, Arthur L. Cleary
Patented Case
View Patent ↗
Granted: Apr 3, 1990
Filed: Apr 26, 1989
Inventors
Peter L. Duffield
Arthur L. Cleary
Assignee (at issue)
VUTEk, Incorporated
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.