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:
Aug. 22, 1989
Filed:
Sep. 08, 1987
Jan van der Meer, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
When a record carrier (14) is inscribed for an n.sup.th time (n>1), in which record carrier the information is recorded in first blocks (FB) in tracks (T.sub.1, T.sub.2, . . . ) which adjoin each other and which are inclined relative to the longitudinal direction of the record carrier, each track containing at least one first block (FB.sub.1) of information and at least one second block (SB.sub.1) of tracking signals (f), only the first blocks of new information are written over the first blocks recorded previously in the tracks and the second blocks of tracking signals are not erased from the record carrier. These second blocks are employed for the purpose of tracking when the record carrier is inscribed for the n.sup.th time. In this way it is achieved that the new information is recorded exactly in the original tracks, so that perfect inserts can be made.