Liquid level indicator: Difference between revisions

Liquid level indicator for storage tank is a patent designed by Lary Wilkins, owner of ERL Performance <ref>[http://www.erlperformance.com/ www.erlperformance.com]</ref>, ERL inc<ref>[http://www.erlinc.net/index.php/view/Content-Main Electromechanical Research Laboratories]</ref>, ERL Marine<ref>[http://commercial-marine.erlinc.net/ ERL Commercial Marine]</ref>, Law Valve of Texas <ref>[http://www.lawvalveoftexas.com/ www.lawvalveoftexas.com]</ref> and other research and technology ventures. It has been registered with USPTO<ref>

[http://www.uspto.gov/ United States Patent and Trademark Office]</ref> on May 4th, 1999 under the patent number 5,900,546<ref>[http://www.google.com/patents?id=qkQWAAAAEBAJ&printsec=abstract&zoom=4&rview=1#PPA1,M1 Liquid level indicator for storage tank on USPTO]</ref>.