Wallace H Coulter, William F Rothermel: Method and apparatus for transporting carriers of sealed sample tubes and mixing the samples. Coulter Electronics, Gerald R Hibnick, September 2, 1986: US04609017 (87 worldwide citation)

A plurality of sealed blood sample tubes are housed in a rack and a plurality of these racks are vertically stacked, with the sample tubes lying horizontally. The racks are successively deposited onto a horizontal conveyor belt which is housed in and moves longitudinally on a table that rocks around ...

William F Rothermel, John P Matthews, James W Walker, Wallace H Coulter: Cassette for supporting test tubes of different diameters and/or lengths. Coulter Electronics, Stephen A Roen, Gerald R Hibnick, August 13, 1985: US04534465 (78 worldwide citation)

A stackable cassette or rack for supporting a plurality of sealed sample containers having different diameters and/or lengths and transporting the same to a testing station of a hematology analyzer device. The cassette comprises a body having a top and a bottom and a rear portion, and the body inclu ...

William F Rothermel: Fluid transport circuit and valve structure therefor. Coulter International, Warren W Kurz, December 28, 1999: US06007046 (9 worldwide citation)

An open/close valve construction for use in solid-state fluid transport circuits having discrete fluid passageways formed in rigid substrates with a substrate land between port regions of the fluid passageways. The valve construction comprises a diaphragm disk having a dome portion overlying the sub ...