Granted Patent
Utility
US 4,850,157 · App. 07/123,967
Apparatus for guiding the flow of abrasive slurry over a lapping surface
Inventor:
Allan L. Holmstrand
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Nov 23, 1987
Inventor
Allan L. Holmstrand
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.