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:
Mar. 22, 1994
Filed:
Sep. 25, 1991
Jun Takayama, Tokyo, JP;
Kiyoshi Sawakata, Kanagawa, JP;
Kozo Kaminaga, Kanagawa, JP;
Seiichi Sakai, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magnetic recording/reproducing device for recording/reproducing information signals for one recording unit over a plurality of recording tracks by helically scanning a magnetic tape with rotary heads. The information signals for one recording unit are recorded on the plurality of recording tracks on the magnetic tape, and guard bands are formed simultaneously between the one recording units. The recording density is substantially improved. Erase heads overwrite the information signals on the magnetic tape and the plurality of recording tracks for one recording unit on the magnetic tape are erased en block, which prevents over-erasing unerased portions during editing.