Allan I Krauter, Fred C Cope, John H Bean: Biopsy seal. Welch Allyn, Bruns and Wall, March 17, 1987: US04649904 (204 worldwide citation)

A disposable seal is provided for a luer lock end fitting, e.g. for a biopsy channel of an endoscope. The fitting has a tubular luer lock device and a retaining ring surrounding the tubular device. The seal is unitarily molded of a soft elastomer and has a double seal arrangement formed of an apertu ...

Jon R Salvati, Fred C Cope, Dominick Danna, Michael C Stone, Raymond A Lia, Gary L Rink, Craig S Whitaker: Control and display section for borescope or endoscope. Welch Allyn, Harris Beach & Wilcox, December 13, 1994: US05373317 (103 worldwide citation)

A control handle and viewing screen assembly combines video monitor and remote steering control for a borescope steering section. A joystick or similar device controls the steering section when an inspection mode is employed. In a second or freeze-frame mode the joystick is used to move a cursor on ...