Granted Patent
Utility
US 4,887,239 · App. 06/882,602
One-time programmable data security system for programmable logic device
Inventor:
John E. Turner
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Jul 7, 1986
Inventor
John E. Turner
Assignee (at issue)
Lattice Semiconductor Corporation
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.