Granted Patent
Utility
US 5,251,292 · App. 07/557,946
Method and apparatus for an equation editor
Inventors:
Joseph William Randal Martel, David Moon
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Jul 25, 1990
Inventors
Joseph William Randal Martel
David Moon
Assignee (at issue)
WordPerfect 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.