Granted Patent
Utility
US 5,256,505 · App. 07/933,393
Lithographical mask for controlling the dimensions of resist patterns
Inventors:
Jang Fung Chen, James A. Matthews
Patented Case
View Patent ↗
Granted: Oct 26, 1993
Filed: Aug 21, 1992
Inventors
Jang Fung Chen
James A. Matthews
Assignee (at issue)
MicroUnity Systems Engineering, 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.