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Patent US4575624A successfully refreshed from Google Patents.
US4575624A
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Arrangement for activating and/or deactivating a marker strip having a magnetizable layer
Assignee: Rheinmetall Industrie AG
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Filing: 1983-11-30
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Granted: 1986-03-11
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Expires: 2003-11-30
Abstract
Abstract A portable device for deactivating and/or activating a magnetizable layer forming part of a marker strip of an antishoplifting system. The device includes an electro-optical reading head for reading specially coded indicia on the marker strip and an A.C. current electro-magnetic coil for producing a magnetic field to deactivate or activate the magnetizable layer of the marker strip. The electro-optical reading head and electro-magnetic coil are mounted in a common portable housing and are connected to a cashier's register.
Inventors
- 👤 Erhard Klinkhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:06
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2402; G08B13/2405; G08B13/2408; G08B13/2411; G06; G06K; G06K19/00; G06K19/06; G06K19/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A portable device for activating and/or deactivating a magnetizable layer which forms part of a marker strip of an anti-shoplifting system, comprising means for producing an electro-magnetic activating or deactivating field; electro-optical reading means for reading a readable or pictorial coding on said marker strip; means for preventing production of said activating or deactivating field until said electro-optical reading means has read said readable or pictorial coating on said marker strip; said electro-magnetic field producing means and electro-optical reading means being mounted in a common portable housing.
Claim 2
Dependent Claim
87 words
A portable device for activating and/or deactivating a magnetizable layer which forms part of a marker strip of an anti-shoplifting system, comprising means for producing an electro-magnetic activating or deactivating field; electro-optical reading means for reading a readable or pictorial coding on said marker strip; means for preventing production of said activating or deactivating field until said electro-optical reading means has read said readable or pictorial coating on said marker strip; said electro-magnetic field producing means and electro-optical reading means being mounted in a common portable housing.
Claim 3
Dependent Claim
41 words
The portable device for activating and/or deactivating a magnetizable layer as set forth in claim 1, including an electrically operable cashier's register, and an electrical connection for connecting said electro-magnetic field producing means and electro-optical reading means to said cashier's register.
Claim 4
Dependent Claim
48 words
The portable device for activating and/or deactivating a magnetizable layer as set forth in claim 2, including manual switching means mounted on said common portable housing and operatively connected to said electro-optical reading means and to said electro-magnetic field producing means for manually activating or deactivating these means.
Claim 5
Dependent Claim
87 words
A marker strip for use with a portable antishoplifting device for deactivating and/or activating the marker strip, comprising in combination, a carrier strip portion; double-stick adhesive foils mounted on opposite sides of the carrier strip portion; two superimposed magnetizable strip portions, one of which is made of hard magnetic material and the other one of which is made of soft magnetic material; and a cover strip portion having readable and/or pictorial indicia imprinted thereon, said foils and strip portions being joined together to from the marker strip.
Claim 6
Dependent Claim
87 words
A marker strip for use with a portable antishoplifting device for deactivating and/or activating the marker strip, comprising in combination, a carrier strip portion; double-stick adhesive foils mounted on opposite sides of the carrier strip portion; two superimposed magnetizable strip portions, one of which is made of hard magnetic material and the other one of which is made of soft magnetic material; and a cover strip portion having readable and/or pictorial indicia imprinted thereon, said foils and strip portions being joined together to from the marker strip.
References Cited (Backward Citations)
GB1212504A
Cited
US3869700A
Cited
US3929278A
Cited
US4090662A
Cited
US4304992A
Cited
US4056712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |