David C Pang

US Patent:

6352708, Mar 5, 2002

Filed:

Oct 14, 1999

Appl. No.:

09/418674

Inventors:

Carlos M. G. Duran - Missoula MT
David T. Cheung - Arcadia CA
David C. Pang - West Covina CA

Assignee:

The International Heart Institute of Montana Foundation - Missoula MT

International Classification:

A61F 202

US Classification:

424423, 523113, 523116

Abstract:

An aqueous solution containing a water miscible organic solvent, polyethylene glycol and heparine, is used to modify the tissue reactivity of an autologous tissue freshly obtained from a host mammal and to render the tissue temporarily more rigid than in its native state, and better suited for shaping, molding, handling and cutting prior to implantation into the host patient. The implant is highly resistant or immune to thickening, contraction and reduced fibrin deposition after it is implanted and exposed to the bloodstream of the host.

US Patent:

6630001, Oct 7, 2003

Filed:

Jun 24, 1998

Appl. No.:

09/103874

Inventors:

Carlos M. G. Duran - Missoula MT
David T. Cheung - Arcadia CA
David C. Pang - Missoula MT

Assignee:

International Heart Institute of Montana Foundation - Missoula MT

International Classification:

A61F 202

US Classification:

623 2372, 623 1111, 623915, 623917, 8 9411

Abstract:

A process for preparing pliable soft tissue specimen which are resistant to cracking and devoid of viable cells includes the steps of treating native soft tissue obtained from a donor by a gradually increasing gradient of aliphatic alcohol or other suitable water miscible polar organic solvent until the last alcohol (or other solvent) solution has at least 25% by volume of the organic liquid. Thereafter, the tissue specimen is treated with a solution containing glycerol or low molecular weight (1000 D) polyethylene glycol, and polyethylene glycol of a molecular weight between approximately 6,000 to 15,000 D and heparin. Thereafter, the tissue specimen is briefly immersed in aqueous heparin solution, frozen and lyophilized. The tissue specimen is suitable for implantation as a homograft or xenograft, with or without rehydration.

US Patent:

8290193, Oct 16, 2012

Filed:

May 11, 2010

Appl. No.:

12/777819

Inventors:

Jeffrey Pang - Menlo Park CA, US
Stephen Y. F. Pang - Menlo Park CA, US
Caroline Pang - Menlo Park CA, US
David Pang - Menlo Park CA, US

International Classification:

H04R 25/00

US Classification:

381374, 381370

Abstract:

A headphone having reduced tendency to tangle comprises an input portion for receiving electrical signals from an output device, an output portion for providing audio signals to a user in response to the electrical signals, a plurality of wires coupled to the input portion and the output portion for providing the electrical signals to the output portion, and a restraint mechanism coupled to the plurality of wires and cable of being repositioned along the plurality of wire, wherein the restraint mechanism is for physically receiving insertion of at least a portion of the input portion and for physically restraining movement of the portion of input portion with respect to output portion when the portion of the input portion is physically inserted into the restraint mechanism, wherein a temporary and removable closed loop of wire is formed from the plurality of wires, until a sufficient separation force is applied.

US Patent:

8345913, Jan 1, 2013

Filed:

Nov 17, 2010

Appl. No.:

13/133842

Inventors:

Jeffrey Pang - Menlo Park CA, US
Caroline Pang - Menlo Park CA, US
David Pang - Menlo Park CA, US
Stephen Y. F. Pang - Menlo Park CA, US

International Classification:

H04R 1/10

US Classification:

381384, 381385

Abstract:

A headphone having reduced-tangling potential includes an audio plug for receive electrical signals from an audio device, coupled via wires to ear buds, wherein the ear buds are for receiving electrical signals and outputting audio, wires coupled to the audio plug and to the pair of ear buds, wherein the coupling wire is configured to provide the electrical signals from the audio plug to at least the pair of ear buds, and a restraint device having a pliable material body having an interior channel, wherein the channel restrains movement of the separate ear buds a first resistance, when the audio plug is inserted into the channel, and wherein the channel restrains movement the separate ear buds by a second resistance, when the audio portion is separated from the channel, wherein the first resistance amount exceeds the second resistance amount.

US Patent:

20130039525, Feb 14, 2013

Filed:

Oct 15, 2012

Appl. No.:

13/652437

Inventors:

David Pang - Menlo Park CA, US
Jeffrey Pang - Menlo Park CA, US
Caroline Pang - Menlo Park CA, US
Stephen Y.F. Pang - Menlo Park CA, US

International Classification:

H04R 1/10

US Classification:

381384

Abstract:

A restraint device for a pair of headphones having a pair of earphones, an audio plug, and a pair of wires coupling the pair of earphones to the audio plug, wherein the restraint device includes a body of a material, wherein the material includes an interior channel, wherein the interior channel is configured to have the pair of wires be slidably disposed therein, wherein the interior channel is configured to have the audio plug be removably disposed therein, wherein the interior channel is configured to restrain relative movement of the pair of wires with respect to the audio plug when the pair of wires and the audio plug are disposed adjacently within the interior channel.

US Patent:

62775553, Aug 21, 2001

Filed:

Mar 24, 2000

Appl. No.:

9/535490

Inventors:

Carlos M. G. Duran - Missoula MT
David T. Cheung - Arcadia CA
David C. Pang - Missoula MT

Assignee:

The International Heart Institute of Montana Foundation - Missoula MT

International Classification:

A01N 100
A01N 102

US Classification:

435 13

Abstract:

A process for preparing pliable soft tissue specimen which are resistant to cracking and devoid of viable cells includes the steps of treating native soft tissue obtained from a donor by a gradually increasing gradient of aliphatic alcohol or other suitable water miscible polar organic solvent until the last alcohol (or other solvent) solution has at least 25% by volume of the organic liquid. Thereafter, the tissue specimen is treated with a solution containing glycerol or low molecular weight (

US Patent:

59977485, Dec 7, 1999

Filed:

Nov 3, 1997

Appl. No.:

8/963314

Inventors:

Edward Rosenberg - Missoula MT
David C. Pang - Missoula MT

Assignee:

The University of Montana - Missoula MT

International Classification:

B01D 1508

US Classification:

210688

Abstract:

A process for removing ions of dissolved heavy metals and complex heavy metals comprises provides a treatment zone in which is contained an extraction material having an activated surface that has an affinity for heavy metal ions and complex heavy metal ions. The activated surface is the reaction product of a polyamine with a covalently anchored trifunctional hydrocarbyl silyl that yields non-crosslinked amino groups to which functional chelator groups can be covalently attached. The activated surface of the extraction material is formed by first hydrating the extraction material surface and then silanizing the hydrated surface with a short chain trifunctional silane having a hydrocarbon substituent containing 1-6 carbon atoms and a terminal leaving group, and then reacting a polyamine with the hydrocarbylsilyl from the silanization of the hydrated surface so as to form an aminohydrocarbyl polymer covalently bound to the extraction material surface.

US Patent:

52994570, Apr 5, 1994

Filed:

Jul 13, 1992

Appl. No.:

7/912311

Inventors:

Donald Pang - Fremont CA
David K. Pang - Pleasanton CA

International Classification:

G01L 1500

US Classification:

7337902

Abstract:

A precision grip meter includes a frame; a base on the frame sized and shaped to engage the palm of the hand; a plurality of plungers on the frame opposite the base and located for being depressed by corresponding fingers of the hand; and a device associated with the base and the plungers for simultaneously measuring and recording both finger strength and overall hand strength. The grip meter may also comprise a frame; a force-detecting device; a first system on the frame for receiving the fingers of a hand and applying force exerted by the fingers to the force-detecting device; and a second system on the frame for receiving the heel of the hand and applying force exerted by the heel to the force-detecting device. Preferably, the grip meter is symmetrical so that it can be used for measuring the finger and hand strength of either the left hand or the right hand.

Author:

David Pang

ISBN #:

0723433747