Mary B Peterson

US Patent:

48182850, Apr 4, 1989

Filed:

Oct 27, 1987

Appl. No.:

7/113795

Inventors:

Gary C. Causley - Aloha OR
Mary J. Peterson - Portland OR

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

C09D 1102

US Classification:

106 22

Abstract:

The ink compositions of this invention comprise four aqueous component ink compositions including four different water-soluble dyes, namely, water-soluble cyan, magenta, yellow and black dyes. These component ink compositions, when used together, produce a hard copy image having a color gamut that visually more closely corresponds to the color gamut of an image displayed on the color video screen than prior art ink compositions. This specific color gamut is represented by the hereinafter described specific ranges of hue angles in a CIELAB standard chromaticity diagram for each of such component ink compositions. The nature and identity of the component ink compositions are also further described by providing the preferred ranges for each component of the wavelength of maximum absorbance (Lambda max, measured in nm) and for the spectral strength in ml/absorbance unit at that maximum point of absorbance.

US Patent:

55732607, Nov 12, 1996

Filed:

Oct 12, 1993

Appl. No.:

8/135745

Inventors:

Christopher J. Peterson - Tierra Verde FL
Mary C. Peterson - Tierra Verde FL

Assignee:

Invacare Corporation - Elyria OH

International Classification:

B62M 114

US Classification:

2802501

Abstract:

A sport wheelchair includes a T-frame that interconnects enlarged rear wheels and a single small diameter caster front wheel. A footrest is adjustably secured to the T-frame and may be adjusted height wise and front to rear as desired by the user. Additionally, handles extend outwardly from opposite sides of the front edge of the seat in selected embodiments of the invention. In some embodiments, a central support member extends upwardly from the seat so that the handles also function for lateral restraint of the user's legs. In still other arrangements, a pair of side supports extend outwardly and downwardly in place of the handles and provide the lateral support as needed.