1
William J Gahara, Thomas R Johnson, Tilak M Shah: Angioplasty balloons and balloon catheters. Worldwide Medical Plastics, St Onge Steward Johnston & Reens, August 21, 1990: US04950239 (137 worldwide citation)

Angioplasty and related medical dilatation balloons are molded from a polyurethane in which the "soft" segment is a minor segment by weight and the "hard" segment is the major segment by weight and which polyurethane has a hardness of at least 75D and a glass transition temperature of more than abou ...


2
William J Gahara, Thomas R Johnson: Multi-lumen catheters. Worldwide Medical Plastics, St Onge Steward Johnston & Reens, February 26, 1991: US04995865 (128 worldwide citation)

Catheters having three lumens for injection and removal of fluids comprise an elongated tube having an integrally formed septum which extends throughout the length of the tube and defines the three lumens which may have the same or different cross-sectional areas. A smooth conical tapered tip is pro ...


3
Gary C Bullard, William J Gahara: Precision tipping device for surgical catheters. Worldwide Medical Plastics, St Onge Steward Johnston & Reens, April 7, 1992: US05102324 (14 worldwide citation)

A device is provided for precision tipping catheters with repeatable accuracy. The device includes a die, a thermal heater for the die, a clamping pad for holding an untipped catheter in an aligned position, a lead screw for moving the catheter into and out of the die a precise distance, and a force ...


4
Gary C Bullard, William J Gahara: Automated side-drilled device and method for catheters. Worldwide Medical Plastics, St Onge Steward Johnston & Reens, August 25, 1992: US05141368 (4 worldwide citation)

A device and method are provided for side-drilling of catheters. The method comprises storing side-drilling hole patterns, selecting a side-drilling hole pattern, positioning the catheter at successive locations defined by the pattern, and drilling holes at the locations. The device carries out the ...


5
Gahara William J, Johnson Thomas R, Shah Tilak M: Angioplasty balloons and balloon catheters. Worldwide Medical Plastics, ST ONGE Ronald J, February 22, 1990: WO/1990/001302

Angioplasty and related medical dilatation balloons are molded from a polyurethane in which the 'soft' segment is a minor segment by weight and the 'hard' segment is the major segment by weight and which polyurethane has a hardness of at least 75D and a glass transition temperature of more than abou ...