Paul S Berger

US Patent:

48873993, Dec 19, 1989

Filed:

Dec 17, 1984

Appl. No.:

6/682683

Inventors:

Richard C. Berger - Syosset NY
Paul L. Berger - Jericho NY

International Classification:

E04B 718

US Classification:

52 27

Abstract:

The unavoidable "dead" space beneath a rooftop site installed air conditioner is soundproofed, as well as weatherproofed, by fiberglass boards wherein the sound passes through open wire mesh sides of the supporting curb of the air conditioner into absorbing contact with these boards, instead of reverberating off prior art solid metal walls which heretofore bounded this dead space.

US Patent:

45985030, Jul 8, 1986

Filed:

Jun 4, 1984

Appl. No.:

6/617267

Inventors:

Richard C. Berger - Syosset NY
Paul L. Berger - Jericho NY

International Classification:

F16M 900
E02D 2744
E04B 136

US Classification:

52 27

Abstract:

An improved arrangement of so-called upper and lower curbs with interposed springs having an interconnected condition allowing for their delivery to an installation site as a single modular section, and at said site each section bolted together and then readily released from each other to then allow vibratory movement in said upper curb relative to said lower curb on said interposed springs, and wherein the release is produced by the force urgency in the springs which dampen the vibration of the air handling unit which is mounted on the curbs.

US Patent:

45139393, Apr 30, 1985

Filed:

Oct 11, 1983

Appl. No.:

6/540511

Inventors:

Richard C. Berger - Syosset NY
Paul L. Berger - Jericho NY

International Classification:

E02D 2744
F16M 900
E04B 136

US Classification:

248544

Abstract:

An improved arrangement of so-called upper and lower curbs with interposed springs having an interconnected condition allowing for their delivery to an installation site as a single unit, and at said site being readily released from each other to then allow vibratory movement in said upper curb relative to said lower curb on said interposed springs, and wherein the release is produced by the force urgency in the springs which dampen the vibration of the air handling unit which is mounted on the curbs.

US Patent:

52123952, May 18, 1993

Filed:

Mar 2, 1992

Appl. No.:

7/844264

Inventors:

Paul R. Berger - Summit NJ
Alfred Y. Cho - Summit NJ
Niloy K. Dutta - Colonia NJ
John Lopata - North Plainfield NJ
Henry M. O'Bryan - Plainfield NJ
Deborah L. Sivco - Warren NJ
George J. Zydzik - Columbia NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H01L 2714

US Classification:

257185

Abstract:

This invention pertains to a p-i-n In. sub. 53 Ga. sub. 47 As photodiode having an optically transparent composite top electrode consisting of a thin semitransparent metal layer from 10 to 40 nm thick and a transparent cadmium tin oxide (CTO) layer from 90 to 600 nm thick. The metal layer makes a non-alloyed ohmic contact to the semiconductor surface, acts as a barrier between the semiconductor and the CTO preventing oxidation of the semiconductor from the O. sub. 2 in the plasma during reactive magnetron sputtering of the CTO layer, and prevents formation of a p-n junction between the semiconductor and CTO. The CTO functions as the n or p contact, an optical window and an anti-reflection coating. The top electrode also avoids shadowing of the active layer by the top electrode, thus allowing greater collection of incident light. Since the top electrode is non-alloyed, inter-diffusion into the i-region is not relevant, which avoids an increased dark current.

US Patent:

52088219, May 4, 1993

Filed:

Jan 24, 1992

Appl. No.:

7/825208

Inventors:

Paul R. Berger - Summit NJ
Niloy K. Dutta - Colonial NJ
William S. Hobson - Summit NJ
John Lopata - North Plainfield NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H01S 319

US Classification:

372 48

Abstract:

This invention pertains to buried heterostructure lasers which have been fabricated using a single step MOCVD growth of an MQW laser structure over a pattern etched GaAs substrate. The wet chemical etching of grooves having a dovetailed cross-section and being parallel to the [011] direction in GaAs substrates produced reentrant mesas which resulted in isolated laser active regions buried by the AlGaAs cladding layer. The 250. mu. m long uncoated lasers emit at about 1. mu. m. Lasers with coated facets have threshold currents of 20 mA and emit >100 mW per facet under room temperature operation. The external differential quantum efficiency for currents of from 30 mA to about 50 mA is found to be nearly independent of temperature in the range of 10. degree. C. to 90. degree. C. suggesting a low temperature dependence of leakage current.

US Patent:

50093860, Apr 23, 1991

Filed:

Jun 1, 1989

Appl. No.:

7/360072

Inventors:

Richard C. Berger - Syosset NY
Paul L. Berger - Jericho NY

International Classification:

F16M 1300

US Classification:

248613

Abstract:

A spring support for a clevis or a pipe in which a main central bolt and two additional auxiliary bolts on opposite sides thereof are used to prestress the spring, wherein tightening of nuts on the auxiliary bolts raise an operative member causing an initial compression of the spring, and subsequent tightening of the nut on the main bolt completes the compression of the spring and also relieves the spring pressure on the auxiliary bolts to thereby facilitate their removal, both of the aforesaid spring compressions being achieved without any change in the horizontal supported position of the pipe.