Granted Patent
Utility
US 4,873,785 · App. 07/322,507
Trap
Inventor:
Shun T. Lai
Patented Case
View Patent ↗
Granted: Oct 17, 1989
Filed: Mar 13, 1989
Inventor
Shun T. Lai
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.