David A Larson

US Patent:

7190639, Mar 13, 2007

Filed:

Jan 13, 2004

Appl. No.:

10/756003

Inventors:

David C. Larson - Mount Prospect IL, US

International Classification:

G01N 11/06

US Classification:

368113, 73 5413

Abstract:

An apparatus uses electrical conductance to determine the start and stop times for viscosity measurements using efflux cups. An efflux cup and two probes are immersed and removed from the fluid. An electric current is applied between each probe and the efflux cup. A timer measures the elapsed time between a decrease in the electric current measured between a first probe and the efflux cup and a decrease in the electric current measured between a second probe and the efflux cup.

US Patent:

20030004773, Jan 2, 2003

Filed:

Mar 14, 2002

Appl. No.:

10/097755

Inventors:

Kevin Clark - Chicago IL, US
David Larson - Chicago IL, US
Tze-John Tang - Chicago IL, US
Vladimir Tokarskiy - Chicago IL, US

Assignee:

Objectsoft, Inc. - Chicago IL

International Classification:

G06F017/60

US Classification:

705/008000

Abstract:

A scheduling system to schedule events with one to many people using invitations with optional dates, times and locations to determine the soonest or the best date and time along with location for the event. When scheduling meetings, it is often necessary to determine the soonest or best date, time and location to meet between multiple people using different calendar systems. The process is time consuming and requires two or more parties to coordinate the schedules of many people. With the scheduling system of this invention, invitations are sent with optional times. Invited participants are polled for the soonest or best date, time and location to conduct the event. Through a asynchronous polling mechanism, the soonest or best available time along with best location may be determined between people on different calendar systems.

US Patent:

20070033048, Feb 8, 2007

Filed:

Dec 9, 2005

Appl. No.:

11/298383

Inventors:

Barry Pollard - Chicago IL, US
Jeff Chardell - Deerfield IL, US
Jon Kozuch - Chicago IL, US
James Royalty - Chicago IL, US
David Larson - Chicago IL, US

International Classification:

G10L 13/08

US Classification:

704260000

Abstract:

A method of producing personalized posters, calendars, and the like (“printed products”) which enables consumers to select from a store of stored images or other digital assets, which may include copyrighted subject matter. The system allows a user to select a stored digital asset for a printed product and incorporate a personalized text message therewith. In order to prevent offensive textual messages, the system includes a text filter for blocking personalized textual material that may be offensive. In an optional embodiment, the system may also include a royalty tracking engine for automatically tracking royalties due for each copyrighted asset produced.

US Patent:

44916981, Jan 1, 1985

Filed:

Jun 17, 1982

Appl. No.:

6/389423

Inventors:

David A. Larson - Downers Grove IL
Daniel A. Schumaker - LaFayette IN

International Classification:

H04R 1900
H04R 714

US Classification:

1791155PV

Abstract:

The transducer diaphragm includes a folded sheet of thin film material, having a front surface and having a plurality of rearwardly extending projections in the form of fins or vanes thereon. Each one of the projections has at least one conductor portion disposed thereon. A substantially flat, thin sheet is secured to form the front face of the diaphragm and to help rigidify the folded sheet. In the preferred form of the invention, each one of the projections is generally channel-shaped throughout its length, and has a bight portion interconnecting a pair of leg portions. In one form of the invention, at least one portion of a conductor is disposed on each one of the projections. The diaphragm is made from a blank, which includes the sheet of film material having a pair of similar conductors, each configured in a similar manner and deposited on the opposite sides thereof in an oppositely disposed confronting relationship and in registration with one another, so that the blank can be readily folded to form the diaphragm, without causing it to bow or otherwise be deformed.

US Patent:

47035102, Oct 27, 1987

Filed:

Dec 20, 1984

Appl. No.:

6/684389

Inventors:

David A. Larson - Downers Grove IL

International Classification:

H04R 702
H04R 904

US Classification:

381196

Abstract:

The transducer diaphragm includes a folded sheet of thin film material, having printed circuit conductors formed thereon in a Greek or serpentine pattern. The Greek pattern includes an odd number of spaced, parallel, printed conductor lines formed into longitudinal and transverse groups, with return conductors extending around the perimeter of the pattern to complete loops of a voice coil. The sheet is folded to form a plurality of rearwardly extending projections, with the folding being along the center lines of each of the longitudinal groups. In the preferred form of the invention, each one of the projections is generally channel-shaped throughout its length, and has a bight portion interconnecting a pair of leg portions, with a longitudinal conductor in the center of the bight and other conductors in the longitudinal group opposite each other on the leg portions.

US Patent:

47502576, Jun 14, 1988

Filed:

May 29, 1986

Appl. No.:

6/868658

Inventors:

David A. Larson - Downers Grove IL

Assignee:

LFF & Associates - San Diego CA

International Classification:

H04R 3100

US Classification:

29594

Abstract:

The method of making the diaphragm includes pressing on the front face of a film at spaced apart areas to deform it progressively into a series of closely-spaced generally U-shaped projections. A manufacturing device presses the sides of the projections inwardly to rigidify them. The transducer magnet assembly includes a series of elongated magnet pole-piece strips which confine magnets and are arranged in parallel spaced-apart rows with the ends thereof fitted into transverse elongated grooves extending within a pair of elongated cross-piece end members. The driver is fixed together in a precise manner by flowing an adhesive material into the grooves, and then by allowing such material to harden.

US Patent:

46047921, Aug 12, 1986

Filed:

Dec 20, 1984

Appl. No.:

6/684379

Inventors:

David A. Larson - Downers Grove IL

Assignee:

LFF & Associates - San Diego CA

International Classification:

H04R 3100

US Classification:

29594

Abstract:

The method of making the diaphragm includes pressing on the front face of a film at spaced apart areas to deform it progressively into a series of closely-spaced generally U-shaped projections. A manufacturing device presses the sides of the projections inwardly to rigidify them. The transducer magnet assembly includes a series of elongated magnet pole-piece strips which confine magnets and are arranged in parallel spaced-apart rows with the ends thereof fitted into transverse elongated grooves extending within a pair of elongated cross-piece end members. The driver is fixed together in a precise manner by flowing an adhesive material into the grooves, and then by allowing such material to harden.

US Patent:

45366233, Aug 20, 1985

Filed:

Oct 13, 1983

Appl. No.:

6/503947

Inventors:

David A. Larson - Downers Grove IL

International Classification:

H04R 900
H04R 714

US Classification:

179115R

Abstract:

The transducer diaphragm includes a folded sheet of thin film material, having a front surface and having a plurality of rearwardly extending projections in the form of fins or vanes thereon. Each one of the projections has at least one conductor portion disposed thereon. A substantially flat, thin sheet is secured to form the front face of the diaphragm and to help rigidify the folded sheet. In the preferred form of the invention, each one of the projections is generally channel-shaped throughout its length, and has a bight portion interconnecting a pair of leg portions. In one form of the invention, at least one portion of a conductor is disposed on each one of the projections. The diaphragm is made from a blank, which includes the sheet of film material having a pair of similar conductors, each configured in a similar manner and deposited on the opposite sides thereof in an oppositely disposed confronting relationship and in registration with one another, so that the blank can be readily folded to form the diaphragm, without causing it to bow or otherwise be deformed.

Address:

5326 N Kimball Ave APT 3E, Chicago, IL 60625

VIN:

4F2CZ02739KM04098

Make:

MAZDA

Model:

TRIBUTE

Year:

2009