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Assignee: American Telephone and Telegraph Company


Location: Morristown, NJ
No. of patents: 2

NumberTitleIssue Date
4876717Adjunct processor for providing computer facility access protection via call transfer
This adjunct processor arrangement performs a centralized call screening function to provide computer port access security. Every call origination in the telephone switching system from a calling party to a protected computer port is interdicted by the te...
10/24/1989
4642550Self-oscillating switching regulator having real-time current adjustment control
A self-oscillating switching regulator includes an inductor which is switched across the input or output depending, respectively, on whether a control voltage does not or does exceed a predetermined threshold. The control voltage is generated from a prede...
02/10/1987
 
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