Selective call receiver theft protection device

Details Selective call receiver theft protection device Selective call receiver theft protection device

1989-12-05

1991-12-17

Crosland, Donnie L.

Communications: electrical

Systems

Nonselective paging

340543, 34082544, 2353825, H04Q 130, G08B 522

Patent

active

050737678

ABSTRACT:
A selective call receiver allows reprogramming of the options stored within a code plug only after entry of a correct password. After a predetermined number of unsuccessful attempts to enter a correct password, the selective call receiver is user disabled such that the user may not reenable the selective call receiver without returning the receiver to the manufacturer or without replacing expensive components thereof.

REFERENCES:
patent: 4246573 (1981-01-01), Kiss
patent: 4378551 (1983-03-01), Drapac
patent: 4518961 (1985-05-01), Davis et al.
patent: 4649538 (1987-03-01), DeLuca et al.
patent: 4683462 (1987-07-01), Takeda et al.
patent: 4755816 (1988-07-01), DeLuca
patent: 4808981 (1989-02-01), Seibold
patent: 4843385 (1989-06-01), Borras

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