1
George P Kalmakis, Victor A Torti, Dan Seguin, Robert H Zier, Gary E Nelson: Pipette tip rack with array of interconnected sleeves. Matrix Technologies, Wolf Greenfield & Sacks P C, February 1, 2000: US06019225 (78 worldwide citation)

An improved pipette tip support rack having a honeycomb structure. The rack includes an array of interconnected sleeves, each of the sleeves being constructed to support a pipette tip therein. The sleeves are connected by bridges which form along abutting, touching surfaces thereof, or which extend ...


2
Victor A Torti, Gary E Nelson, Laurence Keene, George P Kalmakis: Expandable multi-channel pipetter. Matrix Technologies, Wolf Greenfield & Sacks, October 29, 1991: US05061449 (54 worldwide citation)

A pipetting system having a plurality of fittings whose spacing can be simultaneously expanded from one dimension to another. Increasing the spacing is accomplished by pulling a rod, attached to one fitting, which elongates the series of fittings to a second position. In addition, there is a release ...


3
Victor A Torti, George P Kalmakis, Gary E Nelson: Pipettor including an indicator and method of use. Matrix Technologies Corporation, Wolf Greenfield & Sacks P C, September 26, 2000: US06123905 (36 worldwide citation)

A pipettor including a body portion, a cylinder having an interior channel, and a filter plug disposed within the channel is disclosed. The filter plug may include a plurality of pores and may preferably be treated with a first chemical, so as to affect closure of the pores when the filter plug cont ...


4
George P Kalmakis, R Laurence Keene, Gary E Nelson, Victor A Torti: Computer controlled pipetting system. Matrix Technologies Corporation, Jerry Cohen, January 23, 1990: US04896270 (32 worldwide citation)

A computer controlled pipetting system with a hand held pipettor and a control assembly. The pipettor has a motor driven pump for aspirating and dispensing liquid through a pipette which is inserted to the pipettor. The control assembly has a keyboard for controlling operation of the pipetting syste ...


5
Dave Allen, Robert H Zier, George P Kalmakis, Victor A Torti, Gary E Nelson: Uniformly expandable multi-channel pipettor. Matrix Technologies, Wolf Grenfield & Sacks P C, May 22, 2001: US06235244 (21 worldwide citation)

A pipetting system having a plurality of tip fittings whose spacing can be simultaneously, quickly, and accurately adjusted so that the spacing between each adjacent tip fitting is substantially identical. The tip fittings are attached one to another by a linkage such as a pantographic linkage. The ...


6
Victor A Torti, Gary E Nelson, R Laurence Keene, George P Kalmakis: Adjustable multi-channel pipetter. Matrix Technologies Corporation, Wolf Greenfield & Sacks, October 15, 1991: US05057281 (20 worldwide citation)

A pipetting system having a plurality of fittings whose spacing can be individually adjusted by sliding the fittings along a track. Changing the spacing is accomplished by releasing a clamping plate which secures the fittings to the track. The fittings are then slid into the desired position and rec ...


7
Gary E Nelson, George P Kalmakis, Joel Novak, Kenneth Steiner, Jonathon Finger, Richard Cote: Electronic pipettor. Viaflo, Andrus Sceales Starke & Sawall, June 2, 2009: US07540205 (8 worldwide citation)

A hand-held electronic pipettor is designed particularly to be programmed and operated with one hand for the convenience of the user. It uses a capacitance touchpad control for programming, and a separate run button for the operating mode. Internal components are located so that the center of gravit ...


8
David E Butz, Gregory Mathus, Richard Cote, George P Kalmakis: Multi-channel pipettor with repositionable tips. Integra Biosciences, Andrus Sceales Starke & Sawall, October 4, 2011: US08029742 (4 worldwide citation)

A hand-held, multi-channel pipettor has an electronically controlled motor to reposition pipette tips for different center to center spacing. Each repositionable tip fitting assembly has a cam following pin that is driven by cam tracks in a motor driven roller drum. Stationary ports for the multiple ...


9
George P Kalmakis, R Laurence Keene: Apparatus and method for alphanumerically identifying and arranging test tubes. Matrix Technologies Corporation, Samuels Gauthier & Stevens, December 16, 2003: US06663836 (4 worldwide citation)

A method of uniquely identifying a plurality of discrete test tubes. The method includes providing a rack having an array of wells located at the intersections of mutually perpendicular columns and rows. The rack is marked to orient the rack from top to bottom and left to right. Each well is identif ...


10
David E Butz, Gregory Mathus, Richard Cote, George P Kalmakis: Programmable multi-channel pipettor with repositionable tips. Integra Biosciences, Andrus Sceales Starke & Sawall, March 6, 2012: US08128892 (3 worldwide citation)

A hand-held, multi-channel pipettor has an electronically controlled motor to reposition pipette tips for different center to center spacing. Each repositionable tip fitting assembly has a cam following pin that is driven by cam tracks in a motor driven roller drum. Stationary ports for the multiple ...