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:
Dec. 16, 2025
Filed:
Mar. 20, 2023
The Regents of the University of Michigan, Ann Arbor, MI (US);
Al-Thaddeus Avestruz, Ann Arbor, MI (US);
Xin Zan, Ann Arbor, MI (US);
The Regents of the University of Michigan, Ann Arbor, MI (US);
Abstract
A field cancellation device includes a primary coil and a cancellation coil. The primary coil surrounds a primary volume. The cancellation coil is disposed at least in part within the primary volume. Upon simultaneous incidence of an input signal on both coils, the primary coil and the cancellation coil each generate a response to the signal input. The cancellation field associated with the response from the cancellation coil may cancel a portion of the field power in a protected volume, which is the part of the primary volume surrounded by the cancellation coil. The field cancellation device further includes a balancing inductor that controls the balance between the responses generated by the respective coils.