Granted Patent
Utility
US 4,864,501 · App. 07/106,224
Word annotation system
Inventors:
Henry Kucera, Alwin B. Carus
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Oct 7, 1987
Inventors
Henry Kucera
Alwin B. Carus
Assignee (at issue)
Houghton Mifflin Company
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.