Patents by Inventor David Pearce
David Pearce has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20050269906Abstract: An electro-active actuator having a bender construction comprising layers of electro-active material and electrode layers for activation of the electro-active material, the layers of electro-active material being shaped to extend continuously along at least one curved portion and at least one substantially flat portion arranged with electrical terminals for electrical connection to the electrode layers.Type: ApplicationFiled: November 11, 2003Publication date: December 8, 2005Applicant: 1... LimitedInventors: James Allan, David Pearce, Richard Topliss
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Publication number: 20050074134Abstract: An actuator assembly comprises a first member (6a,6b), a second member (4a,4b) and at least one connecting arm (10a,10b) of fixed length connecting the first and second members (6a,6b;4a,4b). The assembly also comprises an actuator (12,14) which is operably engaged with the first member (6a,6b) so as to be capable of applying a rotating force to the first member (6a,6b). In use, rotational movement of the first member (6a,6b) causes relative linear movement of the first and second members (6a,6b;4a,4b) along an axis. The invention also relates to a loudspeaker driver unit and a sensor incorporating the actuator assembly. In the sensor embodiments, the actuator is an electrical transducer.Type: ApplicationFiled: April 3, 2002Publication date: April 7, 2005Inventor: David Pearce
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Publication number: 20050053565Abstract: The present invention relates to methods for identifying a hair growth modulating substance, to methods for preparing a pharmaceutical/cosmetic composition for treatment of hair growth disorders, to methods for treating a human being affected by a hair growth disorder, to hair growth modulating substances, to compositions comprising a substance which modulates the activity of SGK3 or causes a modulation of the activity of a SGK3-derived peptide in the above-mentioned “identifying” methods, and to a transgenic non-human sgk3?/? animal for investigating hair growth disorders.Type: ApplicationFiled: September 9, 2003Publication date: March 10, 2005Inventors: Florian Lang, David Pearce, Jian Wang, James McCormick
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Patent number: 6708235Abstract: A plurality of modems or modem types can run on a host processor, a digital signal processor or both, either concurrently or selectively. Modules of more than one modem program can be swapped in and out of DSP memory space. Common modem code can be run on either a host processor or on a DSP using respective command libraries.Type: GrantFiled: January 31, 2002Date of Patent: March 16, 2004Assignee: Intel CorporationInventors: David Pearce, Wesley Smith, Karl Nordling, Amir Hindie, Karl Leinfelder, Sebastian Gracias, Jim Beaney
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Patent number: 6549523Abstract: A method and apparatus for smooth transitions of background noise as a mobile communication unit roams from a first communication system having a first speech encoder (310) to a second communication system having a second speech encoder (330). As the mobile communication unit roams into the second communication system, the first communication system will transfer the communication signal to the second communication system. Background noise from the first communication system is sampled (320), and as the communication signal is transferred, the noise signal sampled in the first communication system is mixed in a mixer of the second communication system with background noise sampled (340) from the second communication system. As the change in noise progresses, the noise from the first communication system will gradually be decreased and faded out while the noise from the second communication system will be gradually increased to a high power level.Type: GrantFiled: December 30, 1999Date of Patent: April 15, 2003Assignee: Motorola, Inc.Inventors: Jonathan Alistair Gibbs, David Pearce, Dominic Chan, Andrew John Aftelak
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Publication number: 20020108001Abstract: A plurality of modems or modem types can run on a host processor, a digital signal processor or both, either concurrently or selectively. Modules of more than one modem program can be swapped in and out of DSP memory space. Common modem code can be run on either a host processor or on a DSP using respective command libraries.Type: ApplicationFiled: January 31, 2002Publication date: August 8, 2002Inventors: David Pearce, Wesley Smith, Karl Nordling, Amir Hindie, Karl Leinfelder, Sebastian Gracias, Jim Beaney
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Patent number: 6374312Abstract: A plurality of modems or modem types can run on a host processor, a digital signal processor or both, either concurrently or selectively. Modules of more than one modem program can be swapped in and out of DSP memory space. Common modem code can be run on either a host processor or on a DSP using respective command libraries.Type: GrantFiled: September 25, 1998Date of Patent: April 16, 2002Assignee: Intel CorporationInventors: David Pearce, Wesley Smith, Karl Nordling, Amir Hindie, Karl Leinfelder, Sebastian Gracias, Jim Beaney
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Publication number: 20010044782Abstract: In one embodiment, the invention is a 64 bit hardware ID (H/W ID) for tying a software product to a particular computer to prevent software piracy. The 64 bit hardware ID represents ten different components of the user's computer: the CD-ROM device, the disk adapter, the disk device, the display adapter, the first drive serial number, the MAC address, the processor serial number, the processor type, the RAM size in Mb, and the SCSI adapter. Each time the software product is opened, the expanded H/W ID is compared to the hardware on the computer to determine whether a predetermined minimum number of components match. In one embodiment, the expanded H/W ID allows for expansion of the user's computer because so long as the component originally listed in the expanded H/W ID can be found on the computer, then that component matches the expanded H/W ID. Typically, seven out of ten components in the expanded H/W ID must match the computer before the software product will fully operate.Type: ApplicationFiled: May 17, 2001Publication date: November 22, 2001Applicant: Microsoft CorporationInventors: Aidan T. Hughes, David Pearce
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Patent number: 5910951Abstract: A transmitting device (15) for communication over a multiplicity of networks having a communication manager (22) and a mobility manager (20). The mobility manager (20) includes a database (40) having a net table (42) of potential networks and a filter (38). The filter (38) generates a prioritized list of qualifying networks over which a data object is to be transferred. Also described is a method for sifting through and filtering the net table (42) of potential networks and their characteristics. A prioritized list of qualifying networks is generated wherein each qualifying network has a priority. A transmission request is generated based on a combination of the data object and the prioritized list of qualifying networks and is transmitted over the selected qualifying network (26), (28), or (30) having a highest priority.Type: GrantFiled: October 15, 1996Date of Patent: June 8, 1999Assignee: Motorola, Inc.Inventors: Michael David Pearce, Rodd Bryan Zurcher, Lewis B. Oberlander
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Patent number: 5862452Abstract: A method, access point device and a perpherical device provide low complexity dynamic persistence for random access in a wireless communication system. The peripheral device includes: A) a block assignment receiver, for receiving a block assignment having a source address which contains a contention address and a persistence level and identifying the contention address and reading the persistence level; B) a random number generator, coupled to the block assignment receiver, for generating a random number based on the persistence level; and C) a persistence based transmitter, coupled to the random number generator, for transmitting a payload burst containing a resource request based on the random number and the persistence level.Type: GrantFiled: October 20, 1997Date of Patent: January 19, 1999Assignee: Motorola, Inc.Inventors: Mark Conrad Cudak, Michael David Pearce
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Patent number: 5849284Abstract: The invention disclosed is related to a composition for the control of molluscs wherein an effective amount of infective dauer larvae of Phasmarhabditis nematodes which have been cultured with a nematode growth promoting and pathogenicity-inducing bacterium, as well as a carrier or encapsulation agent are provided as the ingredients for the composition. Further, the composition can be used in the form of a water-dispersable powder comprising as the carrier a calcium montmorillonite clay. The nematode concentration in the water-dispersable powder is 0.1.times.10.sup.6 to 2.0.times.10.sup.6 per gram of total composition (wet weight), and preferably from 0.3.times.10.sup.6 to 0.8.times.10.sup.6 per gram of the total composition (wet weight). Further, the nematodes are selected from amongst the species P. neopapillosa or P. hermaphrodita. The growth promoting bacterium is a Moraxella osloensis strain or Pseudomonas fluorescens strain.Type: GrantFiled: March 29, 1996Date of Patent: December 15, 1998Assignee: Agricultural Genetics Company Ltd.Inventors: Michael John Wilson, David McKellar Glen, Jeremy David Pearce
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Patent number: 5548280Abstract: A local area network hub unit (5) has a plurality of switch units (16,17) connected in a ring. Each switch unit (16,17) may be connected to either an adjacent switch unit or to a group of pins of a connector unit (42). Each group of pins of the connector unit may be connected to respective end stations (8,9). Selected groups of two or more switch units (16,17) are connected to a common connector unit (42). Each group of pins of a connector unit (42) maybe coupled by a common coupling unit (7) to their respective end stations.Type: GrantFiled: May 11, 1994Date of Patent: August 20, 1996Assignee: Madge Networks LimitedInventor: David Pearce
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Patent number: 5459440Abstract: A method and apparatus for impedance matching a transmitter to a transmission medium of a communication system during normal operation of the system. The method comprises feeding signals from the transmitter to the transmission medium through a variable impedance; monitoring the potential upstream and downstream of the variable impedance; generating a control signal related to the monitored potentials; and adjusting the impedance of the variable impedance in accordance with the control signal until the monitored potentials satisfy matching conditions in which the transmitter is impedance matched to the transmission medium.Type: GrantFiled: April 18, 1994Date of Patent: October 17, 1995Assignee: Madge Networks LimitedInventors: Philip G. Claridge, David A. Pearce
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Patent number: 5238193Abstract: Apparatus for grinding particulate solid material in a substantially dry state, the apparatus comprising, means for introducing particulate solid material into a grinding chamber (4), a perforated base (8) of the grinding chamber (4) through which gas is introduced to provide an upward flow of gas passing through the particulate solid material and an impeller (42) rotating in the grinding chamber (4) to agitate the particulate solid material. The perforated base (8) has a central imperforate area (10) which causes the gas to pass preferentially through the region near the walls of the grinding chamber (4). In addition, a horizontal baffle plate (17) having a central opening (18) is positioned in the grinding chamber (4) at a height above the perforated base (8) which is not greater than one half of the transverse width of the grinding chamber (4).Type: GrantFiled: April 21, 1992Date of Patent: August 24, 1993Assignee: ECC International LimitedInventor: David A. Pearce
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Patent number: 4852811Abstract: Material is comminuted in a substantially dry state in a chamber (4) as a result of agitation by a rotor. During the process, gas is admitted to the chamber (4) through a foraminous base (8) to flow upwardly in a uniform manner across the cross-section of the chamber. Pulses of gas are directed periodically at the material through inlets (15) to prevent agglomeration of the material. The pressure of the gas admitted through the inlets (15) is higher than that admitted through the foraminous base (8). Surface active agents may be added to the material, also to prevent agglomeration, as well as, or instead of the use of pulsed gas.Type: GrantFiled: March 4, 1988Date of Patent: August 1, 1989Assignee: E.C.C. International LimitedInventors: Roger W. Adams, Hugh R. Falcon-Steward, David A. Pearce
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Patent number: 4538863Abstract: A make and break inductive connector for transferring electrical energy, e.g. under water, by transformer action comprising two separable body parts (11) having mateable end faces (13). Each part has a cavity (15) extending into it from its end face and a magnetic pot core half (17) housed in the cavity so that the end of the pot core half is flush with the body part end face. Within an annular cavity (23) of each core half there is housed a toroidal electrical winding (25) and potting compound occupies the otherwise free space of the body part cavity, including the cavity in the pot core half, so as to enclose the winding completely and preclude direct contact between the winding and the pot core half.Type: GrantFiled: August 13, 1982Date of Patent: September 3, 1985Assignee: Marconi Avionics LimitedInventors: John Allen, David Pearce
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Patent number: 4366103Abstract: Organothiophosphorous compounds, e.g., Merphos, which contain or develop malodorous mercaptan impurities during storage, are protected against such odor development by the addition of minor amounts (0.1 to 10%) of a ketone, especially in the presence of a catalyst such as cuprous chloride or p-toluene sulfonic acid in a concentration range of 0.01 to 0.1%. Formulated products are also claimed.Type: GrantFiled: December 19, 1980Date of Patent: December 28, 1982Assignee: Rhone-Poulenc AgrochimieInventors: David A. Pearce, John J. Mehok
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Patent number: 4000271Abstract: Certain organothiophosphorus compounds in combination with (1) effective amounts of a deodorizing agent selected from linoleic acid, linolenic acid and drying oils such as linseed or tung oil containing same, and/or mixtures thereof and (2) effective amounts of a stabilizing agent selected from alkylene or polyalkylene glycols not only result in deodorizing such normally malodorous organothiophosphorus compounds and stabilizing them against decomposition but unexpectedly provide reduced toxicity.Type: GrantFiled: August 25, 1972Date of Patent: December 28, 1976Assignee: Mobil Oil CorporationInventors: Ross A. Kremer, David A. Pearce
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Patent number: 3939221Abstract: A continuous process for the separation of a mixed xylene isomer feedstock into o - and p - isomer fractions by feeding the mixed xylene isomer feedstock to a fractional distillation column in which a fraction containing a major portion of the o-xylene in the feedstock is removed from the bottom of the column and further fractionated to recover substantially pure o-xylene and a major portion of the p-xylene in the feedstock is removed as an overhead fraction, the p-xylene being removed from the overhead fraction by crystallisation and the mother liquor therefrom being recycled to the feed after contact with an isomerisation catalyst the improvement which comprises contacting the mother liquor remaining after crystallization of p-xylene, together with additional mother liquor, with a substrate active for the selective adsorption of p-xylene and thereafter recovering the adsorbed p-xylene from said substrate, the amount of mother liquor added being substantially equal to the quantity of p-xylene recovered fromType: GrantFiled: July 23, 1974Date of Patent: February 17, 1976Assignee: The British Petroleum Chemical International Ltd.Inventor: David Pearce