1
Richard U Guth: Ampoule assembly and holder. Thomas Hooker, October 12, 1982: US04353869 (27 worldwide citation)

An ampoule holder receives a glass ampoule with a collar surrounding the ampoule neck to permit smooth breaking away of the ampoule tip at the collar. A stopper is inserted into the ampoule mouth and a bubbler tube is then inserted through the stopper and mouth into the interior of the ampoule to fo ...


2
Richard U Guth: Breath test simulator and method. Thomas Hooker, October 4, 1983: US04407152 (16 worldwide citation)

A breath test simulator and method for accurately calibrating breath test instruments used to determine the concentration of ethyl alcohol in breath. The simulator includes concentric chambers filled with a known concentration of ethyl alcohol-water solution. Air flowed into the first chamber is bub ...


3
Richard U Guth: Breath test mouthpiece. Thomas Hooker, October 6, 1981: US04292978 (13 worldwide citation)

A breath-test mouthpiece of the type used to remove solids, saliva and water vapor from the breath of a subject being tested to determine a breath constituent, typically breath alcohol, including axially-aligned mouth and tube pipes with a hollow central collector having a lip-engaging edge to eithe ...


4
David A Fisher, Richard U Guth: Portable breath test simulator. Guth Laboratories, Hooker & Habib P C, March 4, 2003: US06526802 (12 worldwide citation)

A portable breath test simulator including a case having a jar support arm extending to one side of the top of the case. A jar containing a known water-alcohol solution is mounted on the bottom of the arm. The case and jar support the simulator. A magnetic power drive located in the case to one side ...


5
Richard U Guth, David A Fisher: Breath test simulator. Guth Laboratories, Hooker & Habib P C, July 29, 2008: US07404311 (4 worldwide citation)

A breath simulator for supplying a breath test analyzer with a sample effluent of ethyl alcohol that controls headspace and adjacent effluent passageway temperature.


6
Richard U Guth, David A Fisher: Breath test simulator. Hooker & Habib P C, February 24, 2009: US07493793 (3 worldwide citation)

A breath simulator for supplying a breath test analyzer with a sample effluent of ethyl alcohol that controls headspace and adjacent effluent passageway temperature.


7
Richard U Guth, Shawn P Barry: Breath test simulator and method. Guth Laboratories, Hooker & Habib P C, March 1, 2011: US07895878 (3 worldwide citation)

A breath test simulator for supplying a breath test analyzer with a vapor including ethyl alcohol includes a heated thermal mass to heat an inlet passage.


8
Richard U Guth, Shawn P Barry: Breath test simulator and method. Guth Laboratories, Hooker & Habib P C, March 11, 2014: US08667829

A breath test simulator for supplying a breath test analyzer with a vapor including ethyl alcohol includes a heated thermal mass to heat an inlet passage.


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Richard U Guth, David A Fisher: Breath test simulator. Hooker & Habib PC, March 13, 2008: US20080060408-A1

A breath simulator for supplying a breath test analyzer with a sample effluent of ethyl alcohol that controls headspace and adjacent effluent passageway temperature.