Granted Patent
Utility
US 4,809,110 · App. 07/106,935
Narrow contour head assembly
Inventor:
Friedrich R. Hertrich
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Oct 8, 1987
Inventor
Friedrich R. Hertrich
Assignee (at issue)
Digital Equipment Corporation
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.