1
John Houldsworth, Joseph Ingram Field Jr, Geoffrey Bollinger Cox: Two-way, two-wire analog/digital communication system. Eurotherm Controls, Whitham Curtis & Whitham, August 11, 1998: US05793754 (41 worldwide citation)

A pulse density signaling input/output (PDSIO) scheme is implemented to provide a two-way, two-wire hybrid analog/digital communications system. PDSIO signals are sent as logic pulses from a "master" port to one or more "slave" ports over a twisted pair. From one to a predetermined maximum number of ...


2
John Houldsworth: Display apparatus. Elliott Brothers, Kirschstein Kirschstein Ottinger & Cobrin, December 2, 1980: US04237457 (31 worldwide citation)

A method of displaying a symbol on a display area which is effectively a regular array of display elements wherein the symbol is defined by a multiplicity of equally spaced points on the display area and each point is represented by a group of display elements whose relative brightnesses are set so ...


3
John Houldsworth, Gary L Stirk: Method and apparatus for managing energy in plural energy storage units. Texas Instruments Northern Virginia Incorporated, William B Kempler, Wade J Brady III, Frederick J Telecky Jr, November 10, 2009: US07615966 (25 worldwide citation)

A system for managing energy stored in a plurality of series connected energy storage units has a plurality of energy storage unit controllers, each controller being associated with one of the plurality of energy storage units, a balancing circuit between two of the energy storage units, the balanci ...


4
John Houldsworth, Anthony P Duck: Method of assembly for small electrical devices. Mary Helen Sears, Stephen Glazier, March 10, 1992: US05093985 (19 worldwide citation)

A method of assembly for small electrical devices which enhances automated assembly opportunities while reducing costly and nonuniform hand operations, by including the use of flexible connectors, anisotropic adhesives, three dimensional molded circuit boards and elastomeric connectors.


5
John Houldsworth: Method and apparatus for producing signal processing circuits in the delta sigma domain. Duality Semiconductor, Hunton & Williams, May 22, 2001: US06234658 (12 worldwide citation)

The present invention is directed to providing a generalized system and method for enabling circuit design and fabrication in the delta sigma domain. In accordance with exemplary embodiments, a framework for such a system is based on a library of generalized operators that can receive multiple input ...


6
John Houldsworth: Method and apparatus for sensing a cold junction temperature. January 16, 1996: US05484206 (11 worldwide citation)

An improved method and apparatus for sensing a cold junction temperature, wherein two sensors are located near the cold junction temperature, the temperatures at the two sensors are measured, the heat flow between the two sensors and one of the two sensors and the cold junction is constrained to be ...


7
John Houldsworth: One time operating state detecting method and apparatus. Powerprecise Solutions, DLA Piper US, July 24, 2007: US07248053 (10 worldwide citation)

A method and apparatus for detecting a change in an electrical property between contacts. A one-time operating state detection device includes a member coupling a pair of contacts and a detector for detecting a change in the coupling between the pair of contacts when the member is removed.


8
John Houldsworth: Self-propelled drawing device or tracing device. Chessell, Sandler & Greenblum, July 16, 1985: US04528754 (6 worldwide citation)

A self-propelled drawing device is driven by two independent wheels whose axes are fixed, and has a writing tip which marks the drawing medium at a point which is not on the imaginary line joining the points of contact of the wheels with the drawing medium. The drawing device is connected to a stati ...


9
John Houldsworth, Nigel A Jones: Method and apparatus for detecting impedance. PowerPrecise Solutions, DLA Piper US, August 21, 2007: US07259572 (5 worldwide citation)

A method and apparatus for detecting an impedance across a pair of terminals. A sensing circuit is AC coupled to the terminals which produces an output related to a time constant associated with the impedance.


10
John Houldsworth: Method and apparatus for producing signal processing circuits in the delta sigma domain. Duality Semiconductor, Hunton & Williams, March 19, 2002: US06360283 (5 worldwide citation)

The present invention is directed to providing a generalized system and method for enabling circuit design and fabrication in the delta sigma domain. In accordance with exemplary embodiments, a framework for such a system is based on a library of generalized operators that can receive multiple input ...