Quotables
"The abolishment of pain in surgery is a chimera. It is absurd to go on seeking it...knife and pain are two words in surgery that must forever be associated in the consciousness of the patient."
Dr. Alfred Velpeau, French surgeon ; 1839
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| Number | Title | Issue Date |
| 5655012 | Private branch exchange apparatus In a private branch exchange apparatus having a plurality of extension ports, each extension port capable of connecting a push button telephone and a general standard type telephone in parallel, when a call occurs at one extension port where the parallel ... | 08/05/1997 |
| 4985916 | Party line converter A telephone subscriber interface device provides privacy on a party line. The device provides for revertive calling, break-in, automatic disconnect, selective ringing, automatic number identification, and operates on the central office power supply. The d... | 01/15/1991 |
| 4528424 | Multiparty line adapter with privacy feature controlled by reversal of line polarity at a central power source A circuit for adapting a telephone subscriber line to operate as a multiparty line is described wherein a plurality of conventional single line subscriber subsets are provided telephone service on the subscriber line such that each subscriber has privacy ... | 07/09/1985 |
| 4221935 | Control circuit for telephone subscriber station A control apparatus for providing added service telephone features for stations of a multiple party line. Features provided are automatic number identification, party line privacy, fully selective ringing, remote station verification and disconnect and re... | 09/09/1980 |
