John Hiliary Berryhill

US Patent:

51443775, Sep 1, 1992

Filed:

Apr 4, 1991

Appl. No.:

7/680378

Inventors:

Allen M. Barnett - Newark DE
John B. Berryhill - Logan UT

Assignee:

University of Delaware - Newark DE

International Classification:

H01L 3300

US Classification:

357 17

Abstract:

A high-speed heterojunction light-emitting diode is formed by providing a dielectric layer on a heavily doped semiconductor substrate having short minority carrier lifetime. A semiconductor layer of opposite conductivity to the substrate is epitaxially grown through vias in the dielectric layer. This results in a junction area equal to the useful light-emitting area. An electrical contact is formed on the laterally overgrown area of the epitaxially grown material. The diode manufacture is compatible with planar processing techniques commonly used in integrated circuit manufacture.

US Patent:

58072110, Sep 15, 1998

Filed:

Nov 30, 1995

Appl. No.:

8/565088

Inventors:

John H. Berryhill - Smithfield UT

International Classification:

A63B 2206
A63B 2104

US Classification:

482 57

Abstract:

An exercise device is provided which is particularly adapted for use by individuals while seated in a stationary chair. The inventive exercise device employs a folding frame to which are attached bicycle type pedals, a leg press bar, and resistance pulls. The bicycle type pedals are attached to one side of the folding frame, the leg press bar hangs from a horizontal bar on the opposite side of the folding frame, and the resistance pulls are also attached to the other side of the folding frame, opposite the bicycle type pedals. By positioning the front of the exercise device in front of an individual seated in a chair, pedaling exercises can be accomplished. By positioning the rear of the exercise device in front of a seated individual, exercises utilizing the leg press and resistance pulls can be accomplished.