Charles W Hunter

US Patent:

7438968, Oct 21, 2008

Filed:

Oct 26, 2006

Appl. No.:

11/553246

Inventors:

Jack Hebrank - Durham NC, US
Charles Eric Hunter - Jefferson NC, US
Michael A. Wiener - New York NY, US
Drew G. Narayan - Durham NC, US
Laurie E. McNeil - Chapel Hill NC, US

Assignee:

Next Safety, Inc. - Jefferson NC

International Classification:

C03C 12/02

US Classification:

428143, 428329, 428328, 428323

Abstract:

Roadway and vehicular-mounted safety reflectors include a reflective field that incorporates a plurality of discrete crystals that internally reflect light and return the light in a desired directional pattern determined by the internal reflection characteristics and orientation of the crystals. The directional pattern is chosen to optimize the visibility and functionality of the reflector.

US Patent:

20070098407, May 3, 2007

Filed:

Sep 20, 2006

Appl. No.:

11/533667

Inventors:

Jack Hebrank - Durham NC, US
Charles Hunter - Jefferson NC, US
Michael Weiner - New York NY, US
Robert Davis - Raleigh NC, US
Laurie McNeil - Chapel Hill NC, US

Assignee:

Next Safety, Inc. - Jefferson NC

International Classification:

H04B 10/00

US Classification:

398106000

Abstract:

Communication methods and apparatus using ultraviolet (UV) light are provided. Save UV communication devices, including remote control units, can use highly efficient UV LEDs and very low-noise UV photodetectors. In some cases, the LEDs emit light at wavelengths below 400 nm, below 320 nm, or even below 280 nm. In one embodiment, communication can be achieved using an LED that emits less than about 1 picowatt of UV energy at a photodetector distance of up to at least about 10 meters. Longer range communication can also be achieved at higher power levels. Photodetectors having very low dark currents at room temperature, such as below about 1×10A/m, are preferable.

US Patent:

20070163588, Jul 19, 2007

Filed:

Sep 20, 2006

Appl. No.:

11/533529

Inventors:

Jack Hebrank - Durham NC, US
Charles Hunter - Jefferson NC, US
Edward LeMahieu - San Jose CA, US
Chris Hartley - Boone NC, US
Ron Criss - West Jefferson NC, US
Bernard Ballou - Raleigh NC, US
Jocelyn Hunter - Jefferson NC, US
Laurie McNeil - Chapel Hill NC, US
Charles Jones - Jefferson NC, US
Lyndell Duvall - Fleetwood NC, US
Paul Wetzel - Jefferson NC, US

International Classification:

A61M 16/00
A62B 23/02
A62B 18/08

US Classification:

128204180, 128205290, 128206120

Abstract:

Disclosed are personal respirators and clean air systems.

US Patent:

20070174467, Jul 26, 2007

Filed:

Apr 11, 2006

Appl. No.:

11/401575

Inventors:

Bernard Ballou - Raleigh NC, US
Charles Hunter - Jefferson NC, US
Timothy Crocker - Exeter, GB

Assignee:

LastMile Communications Limited - Devon

International Classification:

G06F 15/16

US Classification:

709227000

Abstract:

A distributed communications network comprising a plurality of nodes and a plurality of user devices, wherein each node comprises: a communications device for establishing bi-directional wireless communication with at least one user device, a communications device for establishing bi-directional communication with at least one other node; and a data processor in association with a local memory for storing information for presentation to users, and wherein at least one of the nodes further includes a communications device connected to a further communications network, and wherein nodes are grouped into clusters that cooperate with one another such that if a user requests information which is held in the local memory of a node within a cluster then the nodes cooperate to supply that information to the user and if a connection between a user and the further communications network is required, the nodes cooperate to establish it.

US Patent:

20070174615, Jul 26, 2007

Filed:

Apr 11, 2006

Appl. No.:

11/401574

Inventors:

Bernard Ballou - Raleigh NC, US
Charles Hunter - Jefferson NC, US
Timothy Crocker - Cockwood, GB

Assignee:

LastMile Communications Limited - Devon

International Classification:

H04L 9/00

US Classification:

713168000

Abstract:

A method and device for communication, in which a random code is used in the communication. The method comprises storing a random code in a first device; storing the random code in a second device; and using the random code in a subsequent communication. The invention may be employed in a financial transaction. That is, the random codes may be used either as keys to endorse payment instructions with a digital signature; or as “virtual cash”, in which case the codes themselves are transmitted between the parties. Another application of the invention is in transferring confidential information by a “one time pad” security technique, in which a random list of numbers is used to encode the character code for a symbol, by a simple numerical operation.

US Patent:

48660051, Sep 12, 1989

Filed:

Oct 26, 1987

Appl. No.:

7/113565

Inventors:

Robert F. Davis - Raleigh NC
Calvin H. Carter - Raleigh NC
Charles E. Hunter - Durham NC

Assignee:

North Carolina State University - Raleigh NC

International Classification:

H01L 21205
H01L 2136

US Classification:

437100

Abstract:

The present invention is a method of forming large device quality single crystals of silicon carbide. The sublimation process is enhanced by maintaining a constant polytype composition in the source materials, selected size distribution in the source materials, by specific preparation of the growth surface of seed crystals, and by controlling the thermal gradient between the source materials and the seed crystal.

US Patent:

RE348619, Feb 14, 1995

Filed:

Oct 9, 1990

Appl. No.:

7/594856

Inventors:

Robert F. Davis - Raleigh NC
Calvin H. Carter - Raleigh NC
Charles E. Hunter - Durham NC

Assignee:

North Carolina State University - Raleigh NC

International Classification:

H01L 21365

US Classification:

437100

Abstract:

The present invention is a method of forming large device quality single crystals of silicon carbide. The sublimation process is enhanced by maintaining a constant polytype composition in the source materials, selected size distribution in the source materials, by specific preparation of the growth surface and seed crystals, and by controlling the thermal gradient between the source materials and the seed crystal.

US Patent:

57628963, Jun 9, 1998

Filed:

Aug 31, 1995

Appl. No.:

8/521635

Inventors:

Charles Eric Hunter - Raleigh NC
Dirk Verbiest - Carrboro NC

Assignee:

C3, Inc. - Morrisville NC

International Classification:

C01B 3136

US Classification:

423345

Abstract:

Synthetic gemstones having extraordinary brilliance and hardness are formed from large single crystals of relatively low impurity, translucent silicon carbide of a single polytype that are grown in a furnace sublimation system. The crystals are cut into rough gemstones that are thereafter fashioned into finished gemstones. A wide range of colors and shades is available by selective doping of the crystal during growth. A colorless gemstone is produced by growing the crystal undoped in a system substantially free of unwanted impurity atoms.