Murzban D Jhabvala

50292161, Jul 2, 1991

Jun 9, 1989

7/363807

Murzban D. Jhabvala - Clarksville MD
Hung C. Lin - Silver Spring MD

The United States of America as represented by the Administrator of the
National Aeronautics & Space Administration - Washington DC

H04R 2500

381 681

A multi-channel electronic visual aid device which is able to signal to the user whether sound is coming from the left or right, front or back, or both. For the plurality of channels, which may operate in pairs, the sound is picked up by a respective microphone and amplified and rectified into a DC voltage. The DC voltage is next fed to an analog to digital converter and then to a digital encoder. The binary code from the encoder is coupled into a logic circuit where the binary code is decoded to provide a plurality of output levels which are used to drive an indicator which, in turn, provides a visual indication of the sound level received. The binary codes for each pair of channels are also fed into a digital comparator. The output of the comparator is used to enable the logic circuits of the two channels such that if, for example, the signal coming from the right is louder than that coming from the left, the output of the logic unit of the right channel will be enabled and the corresponding indicator activated, indicating the sound source on the right. An indication of the loudness is also provided.

42723027, Jun 9, 1981

Sep 5, 1979

6/072727

Murzban D. Jhabvala - Seabrook MD

The United States of America as represented by the Administrator of the
National Aeronautics and Space Administration - Washington DC

H01L 21265
H01L 21306

148 15

A method of making V-MOS field effect transistors is disclosed wherein a masking layer is first formed over a surface of a crystalline substrate. An aperture is then formed in the masking layer to expose the surface of the substrate. An anisotropic etchant is applied to the exposed surface so that a groove having a decreasing width within increasing depth is formed. However, the etch is not allowed to go to completion with the result that a partially formed V-shaped groove is formed. Ions are accelerated through the aperture for implantation in the crystalline substrate in the lower portion of the partially formed V-shaped groove. Thereafter, an anisotropic etchant is reapplied to the partially formed V-shaped groove, and the etch is allowed to go to completion.

47092521, Nov 24, 1987

Jul 16, 1982

6/399074

Murzban D. Jhabvala - Seabrook MD
David R. Dargo - Arnold MD
John C. Lyons - Columbia MD

The United States of America as represented by the Administrator,
National Aeronautics and Space Administration - Washington DC

H01L 2714
H01L 29161
H01L 2978

357 30

An infrared photo-responsive element (R. sub. D) is monolithically integrated into a source follower circuit of a metal oxide semiconductor device (10) by depositing a layer of a lead chalcogenide as a photo-resistive element forming an ohmic bridge between two metallization strips (26, 28) serving as electrodes of the circuit. Voltage from the circuit varies in response to illumination of the layer by infrared radiation.

41199960, Oct 10, 1978

Jul 20, 1977

5/817413

Murzban D. Jhabvala - Seabrook MD

The United States of America as represented by the Administrator of the
National Aeronautics and Space Administration - Washington DC

H01L 2978

357 23

A high speed CMOS formed on a single semiconductor substrate includes a DMOS having an asymmetric channel and a VMOS with a relatively short channel length. The short channel length of the VMOS is achieved by: (1) forming a double diffusion along one edge of a V groove, or (2) ion implanting boron into the apex of the V groove and diffusing a single layer to a relatively deep depth along both edges of the groove.

43088686, Jan 5, 1982

May 27, 1980

6/153246

Murzban D. Jhabvala - Seabrook MD

The United States of America as represented by the Administrator of the
National Aeronautics and Space Administration - Washington DC

A61N 132

128421

A fully implantable and self-contained device is disclosed composed of a flexible electrode array 10 for surrounding damaged nerves and a signal generator 12 for driving the electrode array with periodic electrical impulses of nanoampere magnitude to induce regeneration of the damaged nerves.