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. 24, 1989
Filed:
Mar. 15, 1988
Marvin F Estes, Oakfield, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An objective lens is affixed to a permanent magnet which in turn is affixed to an electret material having an inherent charge. A support structure for the permanent magnet is formed from an array of electromagnets which partially surround the permanent magnet. Current signals are controllably applied to the electromagnets to generate a magnetic support field for supporting the permanent magnet and its mounted objective lens. Sensors are provided for sensing the charge inherent in the electret material as a function of the position of the electret material from the sensors. The sensors provide position signals to a control device, such as a microprocessor, which control device provides current signals to the electromagnet array to position the permanent magnet and the associated objective lens at a desired position.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile