William E Cook, Morton A Vodian, Otto Haunold: Multiple object capturing and processing device. Beckman Instruments, W H May, J E Vanderburgh, R S Frieman, January 22, 1985: US04495150 (38 worldwide citation)

A device for handling and washing beads. The device is attachable to a test tube rack and includes a frame, a containing slide, and a capture slide. By manipulating the slides in various combinations of positions the beads may be added to, removed from, or separately washed apart from test tubes in ...

Otto Haunold, Malbone W Greene: Photometer with stationary sample holder and rotatable shutter. Beckman Instruments, R J Steinmeyer, John E Vanderburgh, Robert S Frieman, July 22, 1980: US04213703 (35 worldwide citation)

A sample holder and shutter assembly for photometers is disclosed in which a stationary sample chamber body is mounted in close proximity to a photosensitive device. A light path is provided from the sample chamber to the photosensitive device and shutter means is provided for selectively interrupti ...