Granted Patent
Utility
US 5,000,593 · App. 07/387,343
Matrix pin print head of the hinged-clapper-armature construction
Inventors:
Bernd Gugel, Johann Stempfle
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: Jul 28, 1989
Inventors
Bernd Gugel
Johann Stempfle
Assignee (at issue)
Mannesmann AG
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.