David Michael Schwartz
Architects at Buckland Ct, San Carlos, CA

5969559, Oct 19, 1999

Jun 9, 1997

8/871316

David M. Schwartz - San Carlos CA

H03K 104

327295

A method and apparatus for distributing clock signals in an integrated circuit is disclosed. In a preferred embodiment, the power grid of the integrated circuit is used to distribute a periodic timing signal, in addition to the power supply voltage, to local areas of the integrated circuit, the local areas having circuitry for extracting a local clock signal from the periodic timing signal. Instead of simply carrying a DC power supply signal, the power grid is provided with a waveform constituting the sum of the DC power supply signal and the periodic signal, and the power grid then supplies all areas of the integrated circuit with this waveform. Local circuits then tap the power grid as needed to extract the periodic signal, from which local clock signals are then generated. In another preferred embodiment, a periodic timing signal is provided in the form of electromagnetic radiation to local areas of the integrated circuit by means of an optical or radio frequency transmitter. Associated with each local area of the integrated circuit is an optical or radio frequency receiver for receiving the periodic timing signal, along with conversion circuitry for extracting a local clock signal from the periodic signal.

2014004, Feb 13, 2014

Aug 7, 2012

13/569153

David Eric Schwartz - San Carlos CA, US
Matthew D. Eisaman - Port Jefferson NY, US
Sourobh Raychaudhuri - Mountain View CA, US
Philipp H. Schmaelzle - Los Altos CA, US
Robert A. Street - Palo Alto CA, US
Sean Garner - San Francisco CA, US
Baomin Xu - San Jose CA, US
Jiye Lee - Cambridge MA, US

Palo Alto Research Center Incorporated - Palo Alto CA

B26D 3/08

83880, 83879

A mechanical method for producing micro-scale and nano-scale textures that facilitates, for example, the cost-effective production of nanostructures on large-scale substrates, e.g., during the large-scale production of thin-film solar cells. A “scratcher” (multi-pointed abrasion mechanism) is maintained in a precise position relative to a target substrate such that micron-level features (protrusions) extending from the scratcher's base structure are precisely positioned to contact a surface material layer of the target substrate with a predetermined amount of force, and then moved relative to the substrate (e.g., by way of a conveying mechanism) while maintaining the pressing force such that the micron-level features define elongated parallel nano-scale grooves and/or form nano-scale ridges in the surface material layer (i.e., by mechanically displacing) portions of the surface material layer to form the nano-scale grooves/ridges).

2013026, Oct 10, 2013

Apr 10, 2012

13/443835

David E. Schwartz - San Carlos CA, US

PALO ALTO RESEARCH CENTER INCORPORATED - Palo Alto CA

G05F 1/10

323282

An output power tracking control system for a thermoelectric generator (TEG) is described. The output terminal of the TEG is coupled to the input terminal of the switching voltage converter. The system also includes control circuitry including a pulse width modulator (PWM) having at least one PWM output terminal coupled to the switching control terminal of the switching voltage converter. The PWM generates pulses at the PWM output terminal having a duty cycle that varies based on a difference between a loaded output voltage of the TEG and a predetermined fraction of an unloaded open circuit voltage of the TEG, Voc. The duty cycle of the pulses is configured to maintain the loaded voltage at the output terminal of the TEG to within a tolerance range of the fraction of Voc.

2013011, May 9, 2013

Nov 9, 2011

13/292547

David E. Schwartz - San Carlos CA, US
Ricardo S. Roque - Sunnyvale CA, US

PALO ALTO RESEARCH CENTER INCORPORATED - Palo Alto CA

B05D 3/12, C09D 127/18, C09D 183/04, B05D 3/02, B05D 3/00, B82Y 99/00

427535, 4273722, 427565, 427299, 427240, 524546, 524588, 977773

Forming a hydrophobic layer on a surface can involve a mixture of a micropowder and a binder. The micropowder includes micrometer scale particles having diameters in a range of about 100 nm to about 50 μm. The mixture is applied to the surface and is cured. A majority or at least some of the micrometer scale particles have nanometer scale features having a feature size greater than about 25 nm and less than about 100 nm.

5607356, Mar 4, 1997

May 10, 1995

8/438281

David M. Schwartz - San Carlos CA

Atari Corporation - Sunnyvale CA

A63F 922

463 31

An interactive game film includes, on a video disk, data arranged in clips representing video film segments, each clip having a lead-in segment, a body segment, a loop segment, and a lead-out segment. Each clip matches at least one other, so that when the clips are played in series, the splice is seamless. The clips are displayed by a driver in response to instructions from a game control program unique to a particular game. The game control program provides an interface, in the form of visible or audible subtitles containing keywords, between a player and the driver, whereby the player can, at decision points in the game, control which film clip is displayed next.

2013012, May 23, 2013

Nov 18, 2011

13/299729

Dirk De Bruyker - San Jose CA, US
David Eric Schwartz - San Carlos CA, US
Ricardo Santos Roque - Sunnyvale CA, US
Sean Roark Garner - San Francisco CA, US
Matthew D. Eisaman - Redwood City CA, US
Joseph Robert Johnson - Palo Alto CA, US

PALO ALTO RESEARCH CENTER INCORPORATED - Palo Alto CA

F15C 1/00

137 13, 137803

A thermal switch has a first substrate, a thermally conductive region on the first substrate, a thermally insulative region on the first substrate adjacent the thermally conductive region, a second substrate arranged adjacent the first substrate, a droplet of thermally conductive liquid between the first and second substrate adjacent the thermally conductive region and the thermally insulative region, and an actuator arranged on one of the first or second substrates to cause the droplet to move between the thermally conductive region and the thermally insulative region on the first substrate.

2013013, May 30, 2013

Nov 30, 2011

13/308514

David Eric Schwartz - San Carlos CA, US
Ranjeet Balakrishna Rao - Mountain View CA, US

Palo Alto Research Center Incorporated - Palo Alto CA

B23P 15/26

29890032

A method for generating a microchannel heat pipe on a substrate surface includes co-extruding a primary material and a secondary material such that the primary material forms side walls that are spaced apart by the secondary material to form a composite structure. After the primary material hardens, the secondary material is removed, whereby the hardened primary material forms a pipe body structure having an elongated central channel defined between opposing end openings. A working fluid is then inserted into the elongated central channel, and sealing structures are then formed over both end openings to encapsulate the working fluid.

2013013, May 30, 2013

Nov 30, 2011

13/308519

David Eric Schwartz - San Carlos CA, US
Ranjeet Balakrishna Rao - Mountain View CA, US

Palo Alto Research Center Incorporated - Palo Alto CA

F28D 15/04

16510426

A microchannel heat pipe formed on a substrate surface using co-extruding a primary material and a secondary material such that the primary material forms side wall portions that are spaced apart by the secondary material, and an upper wall portion is formed across the upper ends of the side walls to form a composite structure. After the primary material hardens, the secondary material is removed, whereby the hardened primary material forms a pipe body having an elongated central channel defined between opposing end openings. A working fluid is then inserted into the elongated central channel, and sealing structures are then formed over both end openings to encapsulate the working fluid.

2013014, Jun 6, 2013

Dec 6, 2011

13/312880

David Eric Schwartz - San Carlos CA, US
Sean Roark Garner - San Francisco CA, US
Dirk De Bruyker - San Jose CA, US
Ricardo Santos Roque - Sunnyvale CA, US

PALO ALTO RESEARCH CENTER INCORPORATED - Palo Alto CA

H01H 37/02

337298

A heat switch has a first contact, a plug of thermally conductive material, and a mechanical actuator attached to the plug of thermally conductive material, the mechanical actuator arranged to move the plug into contact with the first contact in a first position and to move the plug out of contact with the first contact in a second position responsive to a signal.

7580533, Aug 25, 2009

May 31, 2005

11/140051

David M. Schwartz - San Carlos CA, US

H04R 25/00, H04R 9/08, H04R 11/04, H04R 17/02, H04R 19/04, H04R 21/02

381172, 381355, 381369

Gas containing particles or droplets flowing continuously through a microphone is perturbed by sound waves. Sound-induced localized pressure changes in the gas are measured by detecting variations in gas opacity with an optical transducer disposed transverse to the flow direction.