David Robert Holmes

US Patent:

8027993, Sep 27, 2011

Filed:

Dec 28, 2006

Appl. No.:

11/646654

Inventors:

David Holmes - Bethesda MD, US
Gary Christoph - Columbia MD, US

Assignee:

Teradota US, Inc. - Dayton OH

International Classification:

G06F 17/30

US Classification:

707783, 726 27, 726 30

Abstract:

Techniques for establishing and enforcing row level database security are presented. Qualifiers are used to uniquely identify particular rows of a database table. The qualifiers are selectively combined to generate a hash value. The hash value is associated with a user. The user is permitted to accesses selective rows of the database table in response to the rows represented in the hash value, which is associated with the user.

US Patent:

20100077111, Mar 25, 2010

Filed:

Sep 23, 2008

Appl. No.:

12/236165

Inventors:

David Holmes - Georgetown TX, US
Gary Keith Law - Georgetown TX, US

International Classification:

G06F 13/00

US Classification:

710 33

Abstract:

Example apparatus and methods to communicatively couple field devices to controllers in a process control system are disclosed. An example method of changing a communication protocol of a first field device in a process control system includes decoupling from the first field device a first removable communication module configured to communicate using a first communication protocol. The example method also includes coupling to the first field device a second removable communication module configured to communicate using a second communication protocol. After coupling the second removable communication module, the first field device is configured to communicate using the second communication protocol. In addition, the first field device is coupled to a first communication channel on an input/output card when communicating using the first communication protocol and the first field device is coupled to the first communication channel on the input/output card when communicating using the second communication protocol.

US Patent:

57607311, Jun 2, 1998

Filed:

Dec 19, 1995

Appl. No.:

8/574617

Inventors:

David W. Holmes - Georgetown TX

Assignee:

Fisher Controls International, Inc. - Clayton MO

International Classification:

G01S 1300

US Classification:

342118

Abstract:

A sensor for sensing a displacement in a mechanical system using radar utilizes a miniaturized radar transceiver formed, typically, on a silicon chip. The transceiver is mounted to a fixed surface that senses a displacement of a moving surface. The moving surface is typically located in mechanical communication with a system to be sensed. By using appropriate translating circuitry, an accurate determination of the nature of displacement of the mechanical system can be made. Mechanical systems sensed can include rotating and sliding components such as motors, valves and pressure gauges. Sensors according to this invention are highly accurate and reliable.

US Patent:

54540160, Sep 26, 1995

Filed:

May 6, 1994

Appl. No.:

8/238861

Inventors:

David J. Holmes - Annapolis MD

Assignee:

Batching Systems Inc. - Owings MD

International Classification:

G06M 700

US Classification:

377 6

Abstract:

A method and apparatus for counting irregularly-shaped articles. A pair of light sources are provided at a sensing plane through which articles to be counted are adapted to pass. Each of the light sources emits a light beam that is at an angle to the other light beam, such as an angle of about 90. degree. Corresponding solar cells are positioned opposite the respective light sources to receive the light signals as the articles pass through the sensing plane. The light sources are alternately operated and the outputs from the respective light detectors are used to calculate an equivalent volume for the article for comparison with a predetermined article volume range to decide whether to count the article. The method and apparatus permit accurate counts of irregularly shaped articles and are substantially independent of the orientation of the article at the sensing plane.

Address:

1608 Appleton St, Baltimore, MD 21217

Phone:

(410)7280226

VIN:

3LNHM26T67R650655

Make:

LINCOLN

Model:

MKZ

Year:

2007