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. 21, 2008
Filed:
Oct. 27, 2006
Applicant:
Bruce T. Williams, Barker, NY (US);
Inventor:
Bruce T. Williams, Barker, NY (US);
Assignee:
Trek, Inc., Medina, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 29/12 (2006.01); G01R 31/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electrostatic voltmeter has an input sensing terminal, a first operational amplifier, a second operational amplifier, a first reference voltage terminal electrically connected to the non-inverting input of the second operational amplifier, a low reference voltage terminal electrically connected to the output of the second operational amplifier, and a voltage indicator, electrically connected between the low reference voltage terminal and the first reference voltage terminal.