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:
May. 04, 1999
Filed:
Apr. 01, 1997
Seiichi Yasukawa, Yotsukaido, JP;
Nobuaki Sasagaki, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A camera which can record photographic information magnetically onto film while rewinding the film. The film has perforations provided in conjunction with each frame to be exposed and near an end in a rewinding direction of the frames. A sensor is used to detect passage start time and passage end time of these perforations. A recording time determining circuit is then used to determine a recording time per unit bit so that photographic information can be recorded in an area of the film associated with each frame of the film. This recording is based on a time difference between the passage start time and the passage end time as detected by the sensor. A magnetic recorder is used to record associated photographic information in the determined recording time onto a magnetic track of the film corresponding of an exposed frame.