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. 05, 2005
Filed:
Oct. 01, 2003
Applicant:
Martin H. Graham, Berkeley, CA (US);
Inventor:
Martin H. Graham, Berkeley, CA (US);
Assignee:
And Yet, Inc., Berkeley, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01R031/00 ;
U.S. Cl.
CPC ...
Abstract
A circuit and method for measuring pollution on an AC power line is described. After attenuation of the AC power signal, the remaining signal is differentiated, rectified and smoothed to provide a DC signal representative of the pollution which can be viewed on an ordinary meter.