Walter S Fields

US Patent:

55257674, Jun 11, 1996

Filed:

Apr 22, 1994

Appl. No.:

8/231380

Inventors:

Walter Fields - Minneapolis MN

International Classification:

H05K 500

US Classification:

181155

Abstract:

A sound imaging system preferably including two enclosures each comprising a truncated conical base unit and a truncated conical upper unit supported above and spaced apart from of the base unit, and containing a bass driver and composite midrange and high frequency drivers. The bass driver is oriented horizontally at the top of the base unit, and the sound energy produced therefrom is reflected by a conically shaped acoustic lens or defector depending from within the interior of the upper unit directly above the bass driver, such that the sound energy is reflected downwardly along and between the spaced apart truncated conical walls of the upper unit and base unit and emanates radially therefrom in all directions. The composite midrange and high frequency drivers are supported at the top of the upper unit on a crown structure having a plurality of vertical legs defining a platform oriented approximately 20. degree. relative to horizontal.

US Patent:

20150022320, Jan 22, 2015

Filed:

May 22, 2014

Appl. No.:

14/285098

Inventors:

Walter FIELDS - St. Louis Park MN, US
Donald Michael SHIELDS - St. Paul MN, US

International Classification:

G08B 5/22

US Classification:

340 81

Abstract:

A locatable object includes a microprocessor for operating the object, and a memory for storing at least a first position and a second position. The locatable object also includes an instrument recovery system integrated into the object. The instrument recovery system further includes a receiver for determining the location of an object, and a communications device for communicating at least the second position to another system.

US Patent:

20150022396, Jan 22, 2015

Filed:

Oct 10, 2013

Appl. No.:

14/051024

Inventors:

Walter FIELDS - St. Louis Park MN, US
Donald Michael SHIELDS - St. Paul MN, US

International Classification:

G01S 19/16
G01S 5/02

US Classification:

34235754, 342450

Abstract:

A locatable object includes a microprocessor for operating the object, and a memory for storing at least a first position and a second position. The locatable object also includes an instrument recovery system integrated into the object. The instrument recovery system further includes a receiver for determining the location of an object, and a communications device for communicating at least the second position to another system.