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:
Oct. 15, 1991
Filed:
Jul. 26, 1989
Applicant:
Inventors:
Mark Bell, Valley Center, CA (US);
Robert S Alpert, Encinitas, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
392458 ; 119-5 ; 219385 ; 219542 ;
Abstract
An aquarium heating system utilizes a conductive coating on an aquarium glass viewing window to heat the aquarium water. The conductive coating is transparent and is disposed on the surface of at least one viewing window. A voltage is supplied to the conductive coating under control of a power supply which operates to maintain the water at a constant temperature.