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Robert G Twiss, Marcia A Ryder: Method and apparatus for determining the position of catheters, tubes, placement guidewires and implantable ports within biological tissue. HDC Corporation, Lyon & Lyon, December 27, 1994: US05375596 (266 worldwide citation)

A method and apparatus for determining accurately, both during and after insertion, the full length position of catheters (including implanted ports (64)), tubes (30) and placement guidewires (22) within biological tissue is disclosed including a transmitter/detector unit (2) having an alternating c ...


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Robert G Twiss, Marcia A Ryder: Method and apparatus for determining the position of catheters, tubes, placement guidewires and implantable ports within biological tissue. HDC Corporation, Lyon & Lyon, May 7, 1996: US05513637 (207 worldwide citation)

A method and apparatus for determining accurately, both during and after insertion, the full length position of catheters (including implanted ports), tubes and placement guidewires within biological tissue is disclosed including a transmitter/detector unit having an alternating current (AC) radio-f ...


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Francis J Canova, Madeleine L Francavilla, Amy A Han, Traci A Neist, Robert G Twiss, Dennis J Boyle: Dual style connector for handheld computer. Palm, Van Mahamedi, Hickman Palermo Truong & Becker, September 4, 2001: US06283777 (24 worldwide citation)

Embodiments of this invention provide for a versatile connector that is capable of receiving any one of two types of connectors. The connector is preferably positioned on a bottom edge of a handheld computer to receive either pogo style or wiping style connectors. As a result, the connector enables ...


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Robert G Twiss, Norman L Creekmore, Frederic M Kozak: Apparatus for securing an electromagnetic shield in a conductive casing. Cisco Technology, Baker Botts L, August 26, 2003: US06610922 (20 worldwide citation)

An apparatus for securing an electromagnetic shield in a conductive, casing includes a conductive frame, spring devices on a first edge of the frame that secure an electromagnetic shield in the frame and electrically couple the shield to the frame, and spring devices on a second edge of the frame th ...


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