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:
Jan. 19, 2010
Filed:
May. 25, 2007
Applicants:
David Wilens, Oak Hill, VA (US);
Mark Hibbard, Arlington, VA (US);
William Cummings, Charlottesville, VA (US);
Inventors:
David Wilens, Oak Hill, VA (US);
Mark Hibbard, Arlington, VA (US);
William Cummings, Charlottesville, VA (US);
Assignee:
Niitek, Inc., Sterling, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 11/26 (2006.01); G01S 7/40 (2006.01); G01S 13/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A variable delay apparatus comprises a calibrating unit receiving a signal from a variable delay unit and from a plurality of fixed delay sources, the calibrating unit comparing the signal from the variable delay unit with a plurality of signals from the fixed delay sources to control operation of the variable delay unit over a delay range independently of environmentally-induced drift.