Granted Patent
Utility
US 4,680,108 · App. 06/836,123
Screening device
Inventor:
Bjorn Ahs
Patented Case
View Patent ↗
Granted: Jul 14, 1987
Filed: Mar 4, 1986
Inventor
Bjorn Ahs
Assignee (at issue)
Kamyr AB
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.