1
Prabhakar P Rao, Thomas B Green, Harry W Schmidt, Larry J DaPrato, Greg J Herman, Michael A Hill: Autosampler with robot arm. Tekmar Company, Westman Champlin & Kelly P A, September 7, 1999: US05948360 (61 worldwide citation)

A modular vial autosampler has a storage area for vials containing samples to be analyzed and at least one modular sampling station. A vial transfer mechanism includes an arm having a gripper that lifts a sample vial from the storage section, and the arm moves it to a station for identification and ...


2
Prabhakar P Rao, David L Sutton: Method and apparatus for nondestructive testing of cement. Halliburton Company, John H Tregoning, William J Beard, April 7, 1981: US04259868 (34 worldwide citation)

Methods and apparatus for the nondestructive testing of cement slurry samples as a function of time are disclosed. A sample placed in a temperature and pressure controlled autoclave is coupled to transducer means under computer control. Ultrasonic energy is propagated through the sample and the tran ...


3
Prabhakar P Rao, Edmund T Lewis, Thomas B Green: Modular vial autosampler. Tekmar Company, Westman Champlin & Kelly PA, November 7, 2000: US06143573 (30 worldwide citation)

A modular vial autosampler has a storage area for vials containing samples to be analyzed and at least one modular sampling station. A vial transfer mechanism lifts a sample vial from the storage section, moves it to a station for identification and then to a sampling station, and under central cont ...


4
Prabhakar P Rao: Programmable digital temperature controller. Halliburton Company, William J Beard, October 11, 1983: US04409662 (25 worldwide citation)

Temperature of a heating device is controlled by a microprocessor in an electrical circuit which electrically communicates temperature control signals to the heating device. The control signals are generated from a predetermined compilation of data stored in the electrical circuit or from external d ...


5
Prabhakar P Rao, Edmund T Lewis, Thomas B Green: Method of introducing standards into a vial. TEKMAR Company, Westman Champlin & Kelly P A, December 7, 1999: US05998217 (19 worldwide citation)

A modular vial autosampler has a storage area for vials containing samples to be analyzed and at least one modular sampling station. A vial transfer mechanism lifts a sample vial from the storage section, moves it to a station for identification and then to a sampling station, and under central cont ...


6
Prabhakar P Rao, John J Moon Jr: High pressure-high temperature autoclave system for testing fluid samples ultrasonically. Halliburton Company, James R Duzan, Thomas R Weaver, February 4, 1986: US04567765 (19 worldwide citation)

A fluid chamber assembly having an improved shape to enhance the reception of the first arrival of the signal from the transmitter transducer which has passed through the cement or fluid sample within the fluid chamber assembly and an improved sealing arrangement for the fluid chamber assembly.


7
Prabhakar P Rao, Edmund T Lewis, Thomas B Green: Vial transporter having an elevator. Tekmar Company, Westman Champlin & Kelly PA, May 2, 2000: US06056921 (14 worldwide citation)

A modular vial autosampler has a storage area for vials containing samples to be analyzed and at least one modular sampling station. A vial transfer mechanism lifts a sample vial from the storage section, moves it to a station for identification and then to a sampling station, and under central cont ...


8
Prabhakar P Rao, Jim B Surjaatmadja, Jack C Penn: Digital pressure controller. Halliburton Company, E Harrison Gilbert III, James R Duzan, Thomas R Weaver, March 11, 1986: US04575313 (12 worldwide citation)

A pressure controller includes a set point switch mechanism by which a selectable pressure to be maintained in a pressure vessel can be set. The actual pressure in the pressure vessel is detected and converted into a corresponding electrical signal by a suitable pressure transducer. Electrical signa ...


9
Prabhakar P Rao, Edmund T Lewis, Thomas B Green: Apparatus for introducing standards into a vial. Tekmar Company, Westman Champlin & Kelly P A, November 30, 1999: US05993744 (9 worldwide citation)

A modular vial autosampler has a storage area for vials containing samples to be analyzed and at least one modular sampling station. A vial transfer mechanism lifts a sample vial from the storage section, moves it to a station for identification and then to a sampling station, and under central cont ...


10
Prabhakar P Rao, Edmund T Lewis, Thomas B Green: Modular vial autosampler. Tekmar Co, LIU ZHIPING, June 18, 1997: CN95194058

A modular vial autosampler has a storage area for vials containing samples to be analyzed and at least one modular sampling station. A vial transfer mechanism lifts a sample vial from the storage area, moves it to a station for identification and then to a sampling station, and under central control ...