Magnetic recording

Details Magnetic recording Magnetic recording

1975-10-14

1978-08-01

Cook, Daryl W.

Registers

Coded record sensors

Particular sensor structure

235493, 360 2, G06K 708, G06K 1906, G11B 2504

Patent

active

041045130

ABSTRACT:
Magnetic recording media including permanent structures of aligned acicular particles have been proposed as a means of identifying and authenticating a medium. A structure which has an improved remanence difference signal is described. A method of making and examining such a structure is described. Arrangements of such media and record / read-out apparatus by which information can be recorded and read-out without interference from the structural remanence differences are described. The use of the media for security documents such as credit cards is described.

REFERENCES:
patent: 3117065 (1964-01-01), Wootter
patent: 3571799 (1971-03-01), Coker, Jr. et al.
patent: 3634797 (1972-01-01), Burkholter
patent: 3790754 (1974-02-01), Black et al.
patent: 3873975 (1975-03-01), Miklos et al.
patent: 3878367 (1975-04-01), Fayling et al.

Affiliated with

Also associated with

Rating

Magnetic recording does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic recording, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1981008