1
Alfred P Mulzet, Gary A Trudgen: Pressure monitoring system. International Business Machines Corporation, Paul M Brannen, November 20, 1979: US04174637 (47 worldwide citation)

A pressure monitoring system especially suitable for use with extra-corporeal circulation systems such as dialyzers, blood cell separators, oxygenators and the like, in which the internal system pressure must be monitored at one or more locations in the blood circuit, and appropriate warnings provid ...


2
David R Grindel, Gary A Trudgen: Input controller circuit apparatus for phase lock loop voltage controlled oscillator. International Business Machines Corporation, Norman R Bardales, February 11, 1986: US04570130 (10 worldwide citation)

A phase lock loop oscillator is provided with a voltage controlled oscillator which includes a current controlled oscillator and an input controller therefor that maintains the center frequency of the current controlled oscillator substantially constant irrespective of changes in the gain of the vol ...


3
George J Dohanich Jr, John C Rohde, Gary A Trudgen: Acceleration control system for a d-c motor. International Business Machines Corporation, John S Gasper, January 6, 1976: US03931555 (6 worldwide citation)

A digital pulse source generates a frequency analog of a desired velocity to which a d-c motor is accelerated. The acceleration circuit comprises a circuit means for converting a frequency analog signal to a frequency dependent direct voltage and a sawtooth voltage. A comparison circuit generates a ...