1
Mohsen Kavehrad, Peter J McLane: Spread spectrum wireless PBX. AT&T Company and AT&T Bell Laboratories, David R Padnes, Erwin W Pfeifle, June 9, 1987: US04672658 (291 worldwide citation)

The present invention relates to a wireless PBX network wherein direct sequence spread spectrum multiple access is used for voice and data communications to support a plurality of local-local and local-external calls. The present wireless PBX arrangement comprises a plurality of local user transceiv ...


2
George W Gawrys, Dale G Leasure, Richard J Nici, Richard A Oberman, Henri Setton, William T Willcock, David L Woody: Customer programmable automated integrated voice/data technique for communication systems. AT&T Bell Laboratories, Erwin W Pfeifle, Barry H Freedman, March 19, 1991: US05001710 (234 worldwide citation)

The present invention enables multi-windowing agent computer terminals, that answer a variety of, e.g., telemarketing calls, to (i) receive call-related information from a communication system at an agent terminal for automatic display in a "telephony" window, and (ii) automatically send such inform ...


3
Anthony Acampora, Jack H Winters: Wireless network for wideband indoor communications. American Telephone and Telegraph Company AT&T Bell Laboratories, Erwin W Pfeifle, December 6, 1988: US04789983 (231 worldwide citation)

The present invention relates to a wideband communication network using wireless radio transmissions either on a stand-alone basis or to supplement a hard-wired network. The exemplary network comprises (a) a plurality of transceivers associated with separate users of the network; (b) optionally at l ...


4
Anthony Acampora: Transmitter and receivers using resource sharing and coding for increased capacity. AT&T Bell Laboratories, Erwin W Pfeifle, January 22, 1985: US04495619 (227 worldwide citation)

The present invention relates to transmitters and receivers in a digital time division multiple access (TDMA) communication system wherein the resource sharing concept is generalized by fully exploiting the available clear air carrier-to-noise ratio (CNR) of a transmission link to achieve very high ...


5
Vasant K Prabhu, Raymond Steele: Frequency-hopped single sideband mobile radio system. AT&T Bell Laboratories, Wendy W Koba, Erwin W Pfeifle, October 23, 1984: US04479226 (197 worldwide citation)

The present invention relates to a frequency-hopped single sideband (SSB) mobile radio system implemented by hopping the carrier frequency of an input signal (s(t)) every .tau. seconds. The hopping is controlled by a carrier-frequency-hopped sequence (f.sub.i (t)) generated by a carrier-frequency-ho ...


6
Emden R Gansner, Stephen C North, Kiem Phong Vo: Technique for drawing directed graphs. AT&T Bell Laboratories, Erwin W Pfeifle, Richard J Roddy, August 28, 1990: US04953106 (192 worldwide citation)

The present invention relates to a computer-implemented technique for drawing directed graphs providing reduced crossings and improved picture quality. An edge list description provided by a user is processed to produce a ranking of all nodes that minimizes the weighted sum of all edges, an edge cos ...


7
George W Gawrys, Richard A Oberman, William T Willcock: Customer definable integrated voice/data call transfer technique. AT&T Bell Laboratories, Erwin W Pfeifle, Barry H Freedman, April 16, 1991: US05008930 (168 worldwide citation)

In the present invention, a first agent terminal, of a group of multi-windowing agent terminals, answers an integrated voice/data call by (i) directly receiving and displaying call-related information from a communication system in a "Phone" window, and (ii) retrieving data information from a host d ...


8
Anthony R Noerpel: Hybrid mode waveguide or feedhorn antenna. Bell Telephone Laboratories Incorporated, Erwin W Pfeifle, January 20, 1981: US04246584 (155 worldwide citation)

The present invention relates to a hybrid mode waveguide or feedhorn antenna for transforming the TE.sub.11 mode into the HE.sub.11 mode. The waveguide or antenna comprises a first waveguide section of uniform cross-section at the TE.sub.11 mode entrance port which in the antenna arrangement changes ...


9
Noach Amitay: Cordless accessed high-speed high-capacity local area networks. American Telephone and Telegraph Company AT&T Bell Laboratories, Erwin W Pfeifle, February 21, 1989: US04807222 (155 worldwide citation)

The present invention relates to a high-speed high-capacity Local Area Network (LAN) wherein each user, of a separate group of one or more of the network users, communicates cordlessly, using radio frequencies or infrared, with an assigned Regional Bus Interface Unit (RBIU) located in the proximity ...


10
Randy D Nash, Wai C Wong: Simultaneous transmission of speech and data over an analog channel. AT&T Bell Laboratories, Erwin W Pfeifle, April 16, 1985: US04512013 (151 worldwide citation)

The present invention relates to a technique for transmitting an entire analog speech signal and a modulated data signal over a transmission channel such as a common analog telephone speech channel. The present technique multiplexes the entire modulated data signal within the normal analog speech si ...