U.S. patents available from 1976 to present.
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Method of securing against theft of goods and device for carrying out said method

Patent 6023951 Issued on February 15, 2000. Estimated Expiration Date: Icon_subject August 19, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Magnetic decoupler
Patent #: 4339853
Issued on: 07/20/1982
Inventor: Lipschitz

Switching apparatus for changing the absolute value and the permanent magnetization direction of ferromagnetic bodies, e.g. of permanent magnets
Patent #: 4497011
Issued on: 01/29/1985
Inventor: Hurtig

Ball clutch mechanism with two sets of balls in separate radial planes
Patent #: 4523356
Issued on: 06/18/1985
Inventor: Charlot, Jr.

Secure release apparatus for anti-theft fastening device
Patent #: 4527310
Issued on: 07/09/1985
Inventor: Vandebult

Pulsed magnetic release mechanism
Patent #: 4651136
Issued on: 03/17/1987
Inventor: Anderson ,   et al.

Anti-theft tag
Patent #: 4774503
Issued on: 09/27/1988
Inventor: Bussard

Circuit and method for energizing a solenoid in an electronic device for a predetermined energizing period
Patent #: 5111394
Issued on: 05/05/1992
Inventor: Hilles, et al.

Article security element Patent #: 5572191
Issued on: 11/05/1996
Inventor: Lundberg

Inventors

Assignee

Application

No. 125501 filed on 08/19/1998

US Classes:

70/57.1, For antitheft signaling device on protected article335/306, Plural magnets705/16Including point of sale terminal or electronic cash register

Examiners

Primary: Boucher, Darnell M.

Attorney, Agent or Firm

International Class

E05B 065/00

Foreign Application Priority Data

1996-02-22 CH

Abstract

An apparatus and method for using a permanent magnet with a high coercive force and a permanent pole-reversible magnet with a low coercive force used in securing members in cooperation with wedging members. The apparatus also includes a release device, with a securing member inserted, and a combined control and feed device and a verification device, in the form of a till. The entire release device can therefore be, for example, directly linked to invoicing for a paid sum. The control and feed device controls and feeds the electromagnet coil of the magnetizing device. To release a securing member, the magnetizing device is activated, thereby reversing the poles of the permanent pole-reversible magnet. Both permanent magnets in the securing member subsequently repel, the wedge is released and the pin can be withdrawn from the locking section.

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