WILLIAM BRUCE ISAACSON
Pilots in Lostwood, ND

License number

North Dakota A0920468

Issued Date

Apr 2015

Expiration Date

Apr 2017

Professional information

Hybrid Competition Diving Board

US Patent:

2014005, Feb 27, 2014

Filed:

Mar 15, 2013

Appl. No.:

13/837082

Inventors:

William B. Isaacson - Stanley ND, US
Michael Anthony Fuqua - Rochester MN, US

International Classification:

A63B 5/10

US Classification:

482 30

Abstract:

A hybrid diving board is disclosed. The hybrid diving board may include a primary diving board having a flat skid-resistant top surface and a bottom surface extending between a first end and a second end, wherein the board first end is configured for attachment to a diving stand and the board second end is a free end. A flex spring and/or a torsional control spring may also be provided that has a first end and a second end wherein the spring is adjacent to a surface of the diving board. The flex spring first end may be configured for attachment to the diving stand or to the diving board at a location proximate the board first end. The hybrid diving board may have a spring constant and/or average modulus of elasticity that is higher than a corresponding spring constant or modulus of elasticity of the primary diving board.

Multi-Focal Diffractive Ophthalmic Lenses

US Patent:

5129718, Jul 14, 1992

Filed:

Nov 21, 1989

Appl. No.:

7/439628

Inventors:

John A. Futhey - Petaluma CA
William B. Isaacson - Stanley ND
Michael J. Simpson - Maplewood MN

Assignee:

Minnesota Mining and Manufacturing Company - Saint Paul MN

International Classification:

G02C 704, G02C 702, G02B 2744

US Classification:

351161

Abstract:

An ophthalmic lens exhibiting diffractive power has a plurality of diffractive zones and smooth surfaces. The zones are arranged such that R. sub. sup. 2 does not equal R. sub. 1. sup. 2 -R. sub. sup. 2 where R. sub. 0 is the radius of the central zone and R. sub. 1 is the radius of the first annular zone.