John T Matthews

US Patent:

6345464, Feb 12, 2002

Filed:

Jan 13, 1999

Appl. No.:

09/229915

Inventors:

Paul Youngcho Kim - Westminster CA
John Wallace Matthews - Newport Beach CA

Assignee:

Surefire, LLC - Fountain Valley CA

International Classification:

F41G 134

US Classification:

42114, 362109, 200518, 200552, 429 99

Abstract:

Apparatus for firing projectiles at targets and for illuminating such targets include a projectile-firing elongate weapon having a fore-end structure and a target illuminator on that fore-end structure in a first quadrant between a vertical plane and a horizontal plane longitudinally through such elongate weapon in a firing position of that weapon. Additionally or alternatively, a target illuminator may include a housing in one piece with part of the fore-end structure. An electric lamp assembly for target illuminators, flashlights or other light sources has a support structure, a bezel structure on that support structure, and a shock-absorbed reflector structure inside that bezel structure. Such shock-absorbed reflector structure includes a reflector having a focal point, a first shock absorber between that reflector and the support structure and a second shock absorber between the bezel structure and that reflector. An electric light source has a luminous portion maintained on the focal point in the reflector by corresponding transverse and longitudinal luminous portion positioners at the light source and the shock absorbed reflector.

US Patent:

6895708, May 24, 2005

Filed:

Jan 22, 2004

Appl. No.:

10/764185

Inventors:

Paul Y. Kim - Irvine CA, US
John W. Matthews - Newport Beach CA, US

Assignee:

Surefire, LLC - Fountain Valley CA

International Classification:

F41C023/00

US Classification:

42 72, 42124, 42 7501, 42 90, 42106

Abstract:

An accessory mount for a firearm having a longitudinal barrel, a first support and a second support forwardly of the first support. The accessory mount includes a first longitudinal mount housing having a rear portion, the first housing positionable along the barrel with its rear portion supported by the first support; a second longitudinal mount housing having a rear portion, the second housing positionable along the barrel with its rear portion supported by the second support; longitudinal grooves in one of the housings, and longitudinal flanges on the other of the housings slidably received by the channels and transversely securing the housings together; and at least one adjustable member carried by one of the housings and cooperating with the other of the housings for urging the housings in longitudinally opposite directions, preferably with the rear portion of the first housing rearwardly urged against the first support and with the rear portion of the second housing forwardly urged against the second support.

US Patent:

D523317, Jun 20, 2006

Filed:

Apr 11, 2005

Appl. No.:

29/227433

Inventors:

Steven T. Ryan - Westminster CA, US
Craig C. Stevens - Dove Canyon CA, US
John W. Matthews - Newport Beach CA, US

Assignee:

Surefire, LLC - Foundation Valley CA

International Classification:

0803

US Classification:

D 8 99

US Patent:

7106057, Sep 12, 2006

Filed:

Mar 17, 2005

Appl. No.:

11/081529

Inventors:

John Matthews - Greenbelt MD, US
Frederick Charles Wellstood - Fairfax VA, US
Soun Pil Kwon - Hyattsville MD, US
Kosta P. Vlahacos - Clarksville MD, US

Assignee:

University of Maryland - College Park MD
National Security Agency - Fort George Meade MD

International Classification:

G01R 33/02
G01R 33/035

US Classification:

324248, 505846

Abstract:

A scanning SQUID microscope capable of high frequency magnetic field measurements uses a hysteretic SQUID detector and a pulsed sampling technique which permits to extend the bandwidth of the SQUID microscope to above GHz region. The system can be readily incorporated into a 4. 2scanning SQUID microscope for imaging chips at room temperature. By biasing the hysteretic SQUID with pulses of a predetermined amplitude, and adjusting a modulation flux applied to the hysteretic SQUID at a plurality of time delays between the activation of the sample under study and the bias pulse, the hysteretic SQUID can be switched on, and the modulation flux value corresponding to such a switching event as a function of time is considered as representation of the magnetic field emanating from the sample under study.

US Patent:

7517109, Apr 14, 2009

Filed:

Jan 30, 2007

Appl. No.:

11/700755

Inventors:

Paul Y. Kim - Santa Ana CA, US
John W. Matthews - Newport Beach CA, US
Robert L. Kolb - Garden Grove CA, US

Assignee:

SureFire, LLC - Fountain Valley CA

International Classification:

F21L 4/04

US Classification:

362205, 362191, 362295, 362398

Abstract:

A flashlight has a lamp assembly with a number of operating states including an off state and a number of different brightness level output states The flashlight has an elongated housing with opposed forward and rear ends. The housing has a body portion extending to the rear end, and a head portion rotatably attached to the body portion and extending to the forward end. The lamp operating state is based on the rotational position of the head portion with respect to the body. The body portion and head portion may be cylindrical elements of a common diameter. The head portion may include an electronic component having a rotatable input that is engaged by an element on the body portion. The flashlight may include a removable end portion opposite the head portion, with a support facility operable to support the housing, such that a user does not need to contact the housing.

US Patent:

7946069, May 24, 2011

Filed:

Oct 21, 2009

Appl. No.:

12/582958

Inventors:

Barry W. Dueck - Sunset Beach CA, US
John W. Matthews - Newport Beach CA, US
Brooke C. Smith - Costa Mesa CA, US

Assignee:

SureFire, LLC - Fountain Valley CA

International Classification:

F41A 21/00

US Classification:

42 90, 42 106, 89 144, 89 143, 89 142

Abstract:

Apparatus and methods for easily, quickly and reliably longitudinally securing and rotationally locking a noise suppressor or other auxiliary device to the muzzle end of a firearm barrel, and to a fixture such as a flash suppressor affixed to the muzzle end of the firearm, and for easily, quickly and reliably removing the noise suppressor or other auxiliary device therefrom.

US Patent:

8209895, Jul 3, 2012

Filed:

May 6, 2011

Appl. No.:

13/102819

Inventors:

Barry W. Dueck - Sunset Beach CA, US
John W. Matthews - Newport Beach CA, US
Brook C. Smith - Costa Mesa CA, US

Assignee:

SureFire, LLC - Fountain Valley CA

International Classification:

F41A 21/00

US Classification:

42 90, 42 106, 89 144, 89 143, 89 142

Abstract:

Apparatus and methods for easily, quickly and reliably longitudinally securing and rotationally locking a noise suppressor or other auxiliary device to the muzzle end of a firearm barrel, and to a fixture such as a flash suppressor affixed to the muzzle end of the firearm, and for easily, quickly and reliably removing the noise suppressor or other auxiliary device therefrom.

US Patent:

8313477, Nov 20, 2012

Filed:

Mar 4, 2011

Appl. No.:

13/041307

Inventors:

Jackie R. See - Fullerton CA, US
Carl J. Buczek - Santa Ana CA, US
John W. Matthews - Newport Beach CA, US

International Classification:

A61M 31/00

US Classification:

604522

Abstract:

A device and methods for the real-time monitoring of stem cells in a stem cell transplant. The device comprises a linear member and particle detection device configured to occupy the lumen of a catheter while the catheter is in place to administer a stem cell transplant to a delivery site in the body of a patient. Monitoring of the stem cells permits the device to provide signals to a computer processor for the determination of one or more characteristics of stem cells in the stem cell transplant.

Address:

19061 Highstream Dr, Germantown, MD 20874

Phone:

(301)5406825

VIN:

3VWEF71K17M069054

Make:

VOLKSWAGEN

Model:

JETTA

Year:

2007