Roy Peter Lindquist

US Patent:

6411208, Jun 25, 2002

Filed:

Jun 5, 1997

Appl. No.:

08/869934

Inventors:

Michael L. Buess - Alexandria VA
Allen N. Garroway - Fort Washington MD
Joel B. Miller - Cheverly MD
James P. Yesinowski - Fort Washington MD
Roy P. Lindquist - Oakton VA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G08B 2100

US Classification:

340540, 324300, 324727

Abstract:

A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate the presence of the target material. The samples that have the piezoelectric resonance are then further screened by a different process to confirm the presence of the target material. For example, samples that have the piezoelectric resonance are further screened for a specific nuclear quadrupole resonance (NQR), a specific nuclear magnetic resonance (NMR) or a specific visual characteristic, to confirm the presence of the target material in the sample. The apparatus and method can be used, for example, to search luggage at ports of entry for the presence of cocaine hydrochloride or heroin hydrochloride.

US Patent:

6956476, Oct 18, 2005

Filed:

Jun 5, 2002

Appl. No.:

10/166287

Inventors:

Michael L. Buess - Alexandria VA, US
Allen M. Garroway - Fort Washington MD, US
Joel B. Miller - Cheverly MD, US
James P. Yesinowski - Fort Washington MD, US
Roy P. Lindquist - Oakton VA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G08B021/00

US Classification:

340540, 324309

Abstract:

A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate the presence of the target material. The samples that have the piezoelectric resonance are then further screened by a different process to confirm the presence of the target material. For example, samples that have the piezoelectric resonance are further screened for a specific nuclear quadrupole resonance (NQR), a specific nuclear magnetic resonance (NMR) or a specific visual characteristic, to confirm the presence of the target material in the sample. The apparatus and method can be used, for example, to search luggage at ports of entry for the presence of cocaine hydrochloride or heroin hydrochloride.

US Patent:

7132942, Nov 7, 2006

Filed:

Sep 14, 2005

Appl. No.:

11/229442

Inventors:

Michael L. Buess - Alexandria VA, US
Allen M. Garroway - Fort Washington MD, US
Joel B. Miller - Cheverly MD, US
James P. Yesinowski - Fort Washington MD, US
Roy P. Lindquist - Oakton VA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G08B 21/00

US Classification:

340540, 324300, 324727

Abstract:

A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate the presence of the target material. The samples that have the piezoelectric resonance are then further screened by a different process to confirm the presence of the target material. For example, samples that have the piezoelectric resonance are further screened for a specific nuclear quadrupole resonance (NQR), a specific nuclear magnetic resonance (NMR) or a specific visual characteristic, to confirm the presence of the target material in the sample. The apparatus and method can be used, for example, to search luggage at ports of entry for the presence of cocaine hydrochloride or heroin hydrochloride.