Granted Patent
Utility
US 4,508,463 · App. 06/438,184
High density dot matrix printer
Inventors:
An Wang, Phillip P. Brown
Patented Case
View Patent ↗
Granted: Apr 2, 1985
Filed: Nov 1, 1982
Inventors
An Wang
Phillip P. Brown
Assignee (at issue)
Wang Laboratories, 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.