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:
Feb. 27, 1990
Filed:
May. 04, 1988
Applicant:
Inventors:
Jim B Surjaatmadja, Duncan, OK (US);
Jack C Penn, Tulsa, OK (US);
Assignee:
Halliburton Company, Duncan, OK (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K / ;
U.S. Cl.
CPC ...
380 25 ; 380 49 ; 379 95 ; 34082531 ; 34082534 ;
Abstract
A security apparatus for interfacing a computer system with a telephone circuit includes a modem and a controller interfacing between the telephone circuit and a modem of the computer system. The first-mentioned modem and the controller operate to answer incoming calls in a manner to disguise that the telephone circuit is connected to a computer system, thereby masking or hiding the computer system from unauthorized users such as 'hackers.'