Granted Patent
Utility
US 5,490,042 · App. 07/926,296
Programmable silicon circuit board
Inventor:
Cornelius C. Perkins
Patented Case
View Patent ↗
Granted: Feb 6, 1996
Filed: Aug 10, 1992
Inventor
Cornelius C. Perkins
Assignee (at issue)
Environmental Research Institute
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.