Granted Patent
Utility
US 4,536,992 · App. 06/548,598
Precision lapping system
Inventors:
Douglas J. Hennenfent, Allan L. Holmstrand, Alan G. Kracke
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Nov 4, 1983
Inventors
Douglas J. Hennenfent
Allan L. Holmstrand
Alan G. Kracke
Assignee (at issue)
Magnetic Peripherals, Inc.
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.