Alan W Bell

US Patent:

6707481, Mar 16, 2004

Filed:

Jan 19, 2000

Appl. No.:

09/487544

Inventors:

Robert T. Krivacic - San Jose CA
Alan G. Bell - Palo Alto CA
Douglas N. Curry - Palo Alto CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B41J 247

US Classification:

347239, 347255

Abstract:

A light source modulator and method of modulating a light source use a lower bandwidth input signal during rendering of image data, which is less susceptible to systematic error. The modulation scheme improves the efficiency of use of high speed memory by limiting a number of intensity level transitions to a single transition per output pixel. In conjunction with the limitation of transitions per rendering of each output pixel, data is provided to the modulator that indicates an intensity level to be provided by the modulator and a timing of a transition to that intensity level. In accordance with the exemplary embodiments of the invention, an intensity level may be a minimum intensity level, a maximum intensity level and at least one intermediate intensity level which is intermediate between the minimum and maximum intensity levels.

US Patent:

6832319, Dec 14, 2004

Filed:

Jul 20, 1999

Appl. No.:

09/358162

Inventors:

Alan Edward Bell - San Jose CA
Jeffrey Bruce Lotspiech - San Jose CA
Chandler Brendan Stanton Traw - Portland OR

Assignee:

International Business Machines Corporation - Armonk NY
Intel Corporation - Santa Clara CA

International Classification:

G06F 1214

US Classification:

713193, 713194, 380228, 380229, 380230, 380234, 380239, 380241, 705 57, 705 58, 705 59

Abstract:

A system and method for enabling broadcast programs to be copied once only by consumer recorders includes writing a unique media identification on each blank disk to which content is to copied in a read-only area of the disk before it is initially recorded. Also, a one-way key management media key block is written to the disk. A content key is derived by combining a media key, derived from the media key block, with the media identification. Additionally, to facilitate copying the content one time only, an exchange key is established between the recorder and a sender such as a satellite receiver or a disk player that is associated with the recorder, and the exchange key is modified with special numbers representing control commands including copy once and copy no more. The exchange key is then encrypted using the content key and then hashed with a nonce to render a bus content key. The bus content key is then used to encrypt the data for copying the data to a disk.

US Patent:

6970259, Nov 29, 2005

Filed:

Nov 28, 2000

Appl. No.:

09/722362

Inventors:

Teresa F. Lunt - Palo Alto CA, US
Matthew K. Franklin - Davis CA, US
David L. Hecht - Palo Alto CA, US
Thomas A. Berson - Palo Alto CA, US
Mark J. Stefik - Portula Valley CA, US
R. Drew Dean - Cupertino CA, US
Alan G. Bell - Palo Alto CA, US
Thomas M. Breuel - Brisbane CA, US
Todd A. Cass - San Francisco CA, US
Douglas N. Curry - Palo Alto CA, US
Daniel H. Greene - Sunnyvale CA, US
Robert T. Krivacic - San Jose CA, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G06K001/00

US Classification:

358 114, 358 328, 358 115, 382100, 382135, 713176, 713186

Abstract:

A print management system includes a policy that determines a protection level for a document to be printed. The document is printed using forgery detection and deterrence technologies, such as fragile and robust watermarks, glyphs, and digital signatures, that are appropriate to the level of protection determined by the policy. A plurality of printers are managed by a print management system. Each printer can provide a range of protection technologies. The policy determines the protection technologies for the document to be printed. The print management system routes the print job to a printer that can apply the appropriate protections and sets the appropriate parameters in the printer. Copy evidence that can establish that a document is a forgery and/or tracing information that identifies the custodian of the document and restrictions on copying of the document and use of the information in the document are included in the watermark that is printed on the document. A document can be verified as an original or established as a forgery by inspecting the copy evidence and/or tracing information in the watermark.

US Patent:

7082413, Jul 25, 2006

Filed:

Nov 24, 1999

Appl. No.:

09/448253

Inventors:

Alan Edward Bell - San Jose CA, US
Jeffrey Bruce Lotspiech - San Jose CA, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04L 4/30
H04B 1/66

US Classification:

705 51, 705 52, 705 53, 705 54, 705 57, 705 58, 380 28, 380 46, 380 54, 380269, 713157, 713176

Abstract:

A system and method for enabling authorized music from a CD or DVD to be compressed by a user for the user's own use, but to prevent the recompression of unauthorized music from, e. g. , the Internet, includes hashing the music during recording with a cryptographic hash, and then signing the hash with a digital signature derived from the hash. Subsequent unauthorized compression and recompression will destroy the digital signature. Accordingly, music to be recorded is hashed to obtain a test digital signature and if, after hashing, the test digital signature matches the digital signature accompanying the music, compression and recording are allowed to proceed.

US Patent:

7141210, Nov 28, 2006

Filed:

Apr 1, 2002

Appl. No.:

10/114611

Inventors:

Alan G. Bell - Palo Alto CA, US
Richard H. Bruce - Los Altos CA, US
Scott A. Elrod - La Honda CA, US
Eric Peeters - Fremont CA, US
Francisco E. Torres - San Jose CA, US

Assignee:

Palo Alto Research Center Incorporated - Palo Alto CA

International Classification:

G01N 31/00

US Classification:

422 51, 422 50, 422 8201, 436147, 977957

Abstract:

A nanocalorimeter array for detecting chemical reactions includes at least one thermal isolation region residing on a substrate. Each thermal isolation region includes at least one thermal equilibration region, within which resides a thermal measurement device connected to detection electronics.

US Patent:

7147763, Dec 12, 2006

Filed:

Apr 1, 2002

Appl. No.:

10/115336

Inventors:

Scott A. Elrod - La Honda CA, US
Eric Peeters - Fremont CA, US
Francisco E. Torres - San Jose CA, US
David K. Biegelsen - Portola Valley CA, US
John L. Dunec - Palo Alto CA, US
Alan G. Bell - Palo Alto CA, US

Assignee:

Palo Alto Research Center Incorporated - Palo Alto CA

International Classification:

G01N 27/26

US Classification:

204547, 204643, 204450, 204600

Abstract:

A device for effecting motion of liquid droplets on a surface through the use of electrostatic field force includes a single substrate on which are disposed a plurality of spaced-apart electrodes. A dielectric material surrounds the electrodes on the substrate. The surface on which the liquid droplets are deposited is fabricated from a material that facilitates motion of the liquid droplets.

US Patent:

7380137, May 27, 2008

Filed:

Feb 2, 2004

Appl. No.:

10/770051

Inventors:

Alan Edward Bell - San Jose CA, US
Jeffrey Bruce Lotspiech - San Jose CA, US
Chandler Brendan Stanton Traw - Portland OR, US

Assignee:

International Business Machines Corporation - Armonk NY
Intel Corporation - Santa Clara CA

International Classification:

G06F 12/14
H04N 7/167

US Classification:

713193, 380228, 380230, 380234, 380241

Abstract:

A system and method for enabling broadcast programs to be copied once only by consumer recorders includes writing a unique media identification on each blank disk to which content is to copied in a read-only area of the disk before it is initially recorded. Also, a one-way key management media key block is written to the disk. A content key is derived by combining a media key, derived from the media key block, with the media identification. Additionally, to facilitate copying the content one time only, an exchange key is established between the recorder and a sender such as a satellite receiver or a disk player that is associated with the recorder, and the exchange key is modified with one or more special numbers representing control commands including copy once and copy no more. The modified exchange key is then encrypted using the content key to render an encrypted modified exchange key, and the encrypted modified exchange key is then hashed with a nonce to render a bus content key. The bus content key is then used to encrypt the data for copying the data to a disk.

US Patent:

7416897, Aug 26, 2008

Filed:

Nov 21, 2003

Appl. No.:

10/719961

Inventors:

Richard H. Bruce - Los Altos CA, US
Francisco E. Torres - San Jose CA, US
Alan G. Bell - Palo Alto CA, US
Eric Peeters - Fremont CA, US

Assignee:

Palo Alto Research Center Incorporated - Palo Alto CA

International Classification:

G01K 17/00
G01K 17/20
G01N 35/00
G01N 25/20

US Classification:

436147, 422 50, 422 51, 422 681, 422 8212, 436 43, 436174, 436175, 436180, 374 31, 374 32

Abstract:

A method is disclosed for high-throughput screening assay sample preparation and testing for the identification of binding between drug targets and library compounds, for use with a calorimetric device measuring the enthalpy of reaction for the binding. The method includes mixing a library compound with a specified solvent and mixing a target compound solution with a second specified solvent on a calorimetric device. The library compound/solvent is merged with the target compound/solvent solution and the library compound/solvent solution is also merged with a third solvent solution on the calorimetric device. The heats of reaction are detected for both merged solutions and are compared.