STEPHEN K ANDERSON, MD
Osteopathic Medicine at Oakdale Ave, Minneapolis, MN

2011007, Mar 31, 2011

Sep 25, 2009

12/567059

Soren Andrew Barr - Blaine MN, US
Ellard Harold Krohnfeld - Plymouth MN, US
Stephen Anderson - Coon Rapids MN, US

F02D 41/06, F02D 23/00

701113, 60602

A system includes an internal combustion engine having an air intake and a pressurizing device disposed in the air intake. The pressurizing device is a turbocharger or a supercharger. A gaseous fuel supply is fluidly coupled to the air intake at a position upstream of the pressurizing device through a first fluid conduit and fluidly coupled to the air intake at a position downstream of the pressurizing device through a second fluid conduit. A valve is disposed in the second fluid conduit and includes an electronic control input. The valve responds to an electronic signal at the electronic control input. The system includes an engine start indicating device electronically coupled to the electronic control input, where the engine start indicating device provides the electronic signal to open the valve in response to the engine being in a starting operating condition.

5245333, Sep 14, 1993

Sep 25, 1991

7/766667

Stephen D. Anderson - Minneapolis MN
Roger L. Frick - Hackensack MN
Glen E. Monzo - Minneapolis MN
Brian L. Westfield - Eden Prairie MN

Rosemount Inc. - Eden Prairie MN

G06C 1900

34087030

A three wire transmitter bidirectionally communicates AC signals to and from a first external device and sends DC signals to a second external device. The transmitter includes a communication circuit which is energized from power and common terminals and includes memory storage for transmitter status and a process variable (PV). The communication circuit receives a sensor output indicative of the PV and provides the DC signal and the AC signal to a signal terminal which connects to both external devices, and also receives AC signals from the first external device. The communications circuit has a characteristic AC impedance between the signal and common terminals over an AC frequency range for receiving and transmitting AC signals to and from the first external device so that the receiving signals are not shorted out and so the transmitted signals can be received. The communications circuit has a characteristic DC impedance between the signal and common terminals over a range of frequencies which include DC and typically extend to approximately 20 Hz. The characteristic impedance is substantially lower than the impedance of the second external device which receives DC signals so that the accuracy of the DC signal is not compromised.