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. 03, 1990
Filed:
Jul. 11, 1989
Applicant:
Inventors:
Jan Ballyns, Pickering, Ontario, CA;
John C Martin, Toronto, Ontario, CA;
Paul H Martin, Toronto, Ontario, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318280 ; 318466 ;
Abstract
A control system for controlling the direction of rotation of the reversible D.C. motor is provided which includes a master control circuit and a slave control circuit which is selectively operable. The control circuit permits the movement of the door to be arrested at any time and to be reversed at any time by operating the master control and allowing similar control by means of the slave control when it is activated.
Ballyns, Jan. (1990). Control system for roll-up doors (U.S. Patent No. 4939433). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4939433
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile