Kenneth J Greer

US Patent:

7587138, Sep 8, 2009

Filed:

Feb 23, 2007

Appl. No.:

11/678485

Inventors:

Kenneth Mc Greer - Fremont CA, US
Anthony J. Ticknor - Cupertino CA, US
Hao Xu - San Jose CA, US

Assignee:

NeoPhotonics Corporation - San Jose CA

International Classification:

H04J 14/02
G02B 6/28
G02B 6/26

US Classification:

398 82, 385 24, 385 31

Abstract:

An optical device containing a four-port optical mixer capable of distributing the optical power presented at either or both of two input ports to specified ratios in two output ports.

US Patent:

20060007006, Jan 12, 2006

Filed:

Jun 19, 2003

Appl. No.:

10/600307

Inventors:

John Alioto - San Francisco CA, US
Kenneth Greer - Los Altos Hills CA, US
Matthew Alioto - Los Angeles CA, US

International Classification:

G08B 17/12
G01J 1/00

US Classification:

340600000, 250336100

Abstract:

A computer program, database and method for the detection of fissile or radioactive material or radiation shielding material in a container works with detection devices brought into proximity to containers so that the presence of fissile or radioactive material, or shielding materials to conceal the presence of such fissile or radioactive materials, may be detected. A comparison may then be made of the output of the detector to a threshold to determine subsequent action regarding the shipping container. The threshold may be based on the output of known, dangerous radioactive materials, known legitimate contents or empty containers.