The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 1992
Filed:
Sep. 08, 1989
Applicant:
Inventors:
Juanita J Hansen, Rochester, MN (US);
Dale A Peterson, Rochester, MN (US);
Erwin P Simon, Rochester, MN (US);
David G Wenz, Rochester, MN (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ; G06F / ;
U.S. Cl.
CPC ...
395600 ; 364280 ; 3642807 ; 3642813 ; 3642816 ; 3642817 ; 3642821 ; 3642823 ; 3642831 ; 3642832 ; 3642833 ; 3642834 ; 3642842 ; 364D / ;
Abstract
A text document is stored as a sequence of primary records linked by a table. When an operator changes one of the records, the changed text is stored as a secondary record associated with a primary record in the table. If the operator later chooses to undo the changes, the secondary records are deleted. If he chooses to keep the changes, the secondary records are substituted for the associated primary records, and the latter are deleted.