Granted Patent
Utility
US 4,817,137 · App. 07/126,877
Apparatus for remotely determining hook status conditions
Inventors:
Yechiel Rosenfeld, Larry Kahhan, Jaulin Ding
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Nov 30, 1987
Inventors
Yechiel Rosenfeld
Larry Kahhan
Jaulin Ding
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.