Gregory L Grosbard

US Patent:

48603708, Aug 22, 1989

Filed:

Feb 12, 1988

Appl. No.:

7/155601

Inventors:

Gregory Grosbard - Miami FL

International Classification:

H04R 904

US Classification:

381197

Abstract:

The diaphragm of an acoustic loudspeaker is suspended by means of the force of a magnetic field applied along a gravitational load axis to avoid direct or indirect physical contact with the support during drive of the diaphragm by an electrical signal. Displacement of the speaker along the gravitational axis is sensed to regulate operation of the amplifier through which the driving signal is applied to the voice coil supported by the diaphragm.

US Patent:

47524294, Jun 21, 1988

Filed:

Sep 2, 1986

Appl. No.:

6/903039

Inventors:

Gregory Grosbard - Miami FL

International Classification:

B29C 4700
C08J 320

US Classification:

264141

Abstract:

A thermoplastic resin is homogeneously mixed with a carbohydrate additive within a predetermined weight ratio range and then extruded under the usual extrusion temperature and pressure conditions to enhance physical properties of the extruded material.

US Patent:

48247014, Apr 25, 1989

Filed:

Feb 12, 1988

Appl. No.:

7/155379

Inventors:

Gregory Grosbard - Miami FL

International Classification:

B05D 302
C08J 320

US Classification:

4273855

Abstract:

High oxygen barrier characteristics over a wide range of humidity conditions is achieved with a coating formed by an ethylene vinyl alcohol copolymer resin having a sugar additive uniformly dispersed therein by dissolution with the resin in a liquid carrier forming a solvent of a coating solution through which the additive modified resin coating is applied to a passive substrate.