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. 16, 2013
Filed:
Dec. 14, 2011
Applicants:
Daniel Gershman, Ann Arbor, MI (US);
Bruce Block, Ann Arbor, MI (US);
Martin Rubin, Ann Arbor, MI (US);
Thomas Zurbuchen, Ann Arbor, MI (US);
Inventors:
Daniel Gershman, Ann Arbor, MI (US);
Bruce Block, Ann Arbor, MI (US);
Martin Rubin, Ann Arbor, MI (US);
Thomas Zurbuchen, Ann Arbor, MI (US);
Assignee:
The Regents of the University of Michigan Office of Technology Transfer, Ann Arbor, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 49/34 (2006.01); H01J 49/42 (2006.01); B01D 59/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
The apparatus introduces a second adjustable resonant point in a QMS at a frequency that is close to a multiple of the fundamental frequency by adjusting driving point impedance characteristics of the QMS. The apparatus measures the first and second resonant point of the QMS to account for changes in the operational characteristics of the QMS.