1
Paul H McClelland, Kenneth E Trueba: Printhead with pump driven ink circulation. Hewlett Packard Company, Raymond A Jenski, January 25, 2000: US06017117 (225 worldwide citation)

A printhead for an inkjet printer employs an integral pump disposed in an ink feed channel, input well, or output well to circulate ink to the ink expulsion chambers in the printhead.


2
Brian J Keefe, Steven W Steinfield, Winthrop D Childers, Paul H McClelland, Kenneth E Trueba: Ink delivery system for an inkjet printhead. Hewlett Packard Company, January 11, 1994: US05278584 (161 worldwide citation)

This invention provides an improved ink flow path between an ink reservoir and vaporization chambers in an inkjet printhead. In the preferred embodiment, a barrier layer containing ink channels and vaporization chambers is located between a rectangular substrate and a nozzle member containing an arr ...


3
Ross R Allen, Si Ty Lam, Paul H McClelland, Eric G Hanson: Wide inkjet printhead. Hewlett Packard Company, November 21, 1995: US05469199 (134 worldwide citation)

A novel, wide inkjet printhead and method of forming said inkjet printhead is disclosed, wherein a pattern of orifices are formed, using a step-and-repeat process, in a flexible tape using laser ablation or other suitable etching devices. The location of the orifices corresponds to where ink will be ...


4
Kit C Baughman, Jeffrey A Kahn, Paul H McClelland, Kenneth E Trueba, Ellen R Tappon: Fabrication of ink fill slots in thermal ink-jet printheads utilizing chemical micromachining. Hewlett Packard Company, February 7, 1995: US05387314 (116 worldwide citation)

An ink fill slot can be precisely manufactured in a substrate utilizing photolithographic techniques with chemical etching, plasma etching, or a combination thereof. These methods may be used in conjunction with laser ablation, mechanical abrasion, or electromechanical machining to remove additional ...


5
Paul H McClelland, Douglas A Sexton, Kit Baughman, Marvin G Wong, Eldurkar Bhaskar, Marzio Leban: Large area inkjet printhead. Hewlett Packard Company, October 24, 2000: US06135586 (100 worldwide citation)

A pagewide printhead for an inkjet printer employs a stretch-to-fit flex circuit with orifices indexed to reference indentations on the flex circuit. Heater resistors disposed on a block of thermally stable insulating material are indexed to reference features accurately located on the block. The re ...


6
Christopher A Schantz, Eric G Hanson, Si Ty Lam, Paul H McClelland, William J Lloyd, Laurie S Mittelstadt, Alfred I Tsong Pan: Laser ablated nozzle member for inkjet printhead. Hewlett Packard Company, April 19, 1994: US05305015 (84 worldwide citation)

In one of the preferred embodiments, an inkjet printhead includes a nozzle member formed of a polymer material that has been laser-ablated to form tapered inkjet orifices. The nozzle member is then mounted to a substrate containing heating elements, each heating element being associated with a singl ...


7
Frank L Cloutier, Robert N Low, Paul H McClelland: Monolithic ink jet print head. Hewlett Packard Company, Joseph H Smith, March 20, 1984: US04438191 (73 worldwide citation)

A method of making a monolithic bubble-driven ink jet print head is provided which eliminates the need for using glue or other adhesives to construct multiple part assemblies. The concept of the method is to provide a layered structure which can be manufactured by relatively standard integrated circ ...


8
James Stasiak, Paul H McClelland, David E Hackleman, Grant Pease, R Stanley Williams, Kevin Peters: Free-standing nanowire sensor and method for detecting an analyte in a fluid. Hewlett Packard Development Company, January 16, 2007: US07163659 (54 worldwide citation)

A sensor device and method for detecting the presence of an analyte in a fluid solution are disclosed. The sensor device system can comprise a substrate and an array of free-standing nanowires attached to the substrate. The array can include individual free-standing nanowires wherein each of the ind ...


9
Christopher A Schantz, Eric G Hanson, Si Ty Lam, Paul H McClelland, William J Lloyd, Laurie S Mittelstadt, Alfred I Pan: Nozzle member including ink flow channels. Hewlett Packard Company, March 1, 1994: US05291226 (53 worldwide citation)

In one of the preferred embodiments, an inkjet printhead includes a nozzle member formed of a polymer material that has been laser-ablated to form inkjet orifices, ink channels, and vaporization chambers in the unitary nozzle member. The nozzle member is then mounted to a substrate containing heatin ...


10
Paul H McClelland, Alfred Pan: Thermally induced pressure pulse operated bi-stable optical switch. Hewlett Packard Company, Lucinda G Price, October 22, 2002: US06470106 (49 worldwide citation)

A thermal optical switching cell for controlling the transmission of light through optical channels that includes a switching conduit containing a working fluid that is index of refraction matched to the optical channels and an amount of light diverting material that is substantially immiscible in t ...