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:
Mar. 02, 1976
Filed:
Jul. 10, 1974
Applicant:
Inventor:
David Maxwell, New York, NY (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
B43k / ; B43k / ;
U.S. Cl.
CPC ...
401 17 ; 401199 ; 401213 ;
Abstract
A marker system that employs an erasing unit that can couple and uncouple readily from its marker to facilitate the use of specific chemical reagents to 'erase' their associated indicator dye inks without the use of non-discriminating bleaches. This erasing unit or anti-marker marker can be mounted in the marker cap, alternately in the marker barrel or used as a separate erasing unit.