Inventor

David Marschik

Inventor

Murrysville, PA, US

Overview

12→

Patents

1987–1995

Patent span

Electricity

Primary field (CPC H)

Patents· 12 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H01Hprimary

H01HElectric switches24%

H01FMagnets14%

G10KSound-producing devices10%

H02HEmergency protective circuit arrangements10%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution10%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%

B06BMethods or apparatus for generating or transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency, e.g. for performing mechanical work in general5%

F17CVessels for containing or storing compressed, liquefied or solidified gases5%

F41BWeapons for projecting missiles without use of explosive or combustible propellant charge5%

H02JElectric power networks5%

PatentTitleYear

5,450,373'Apparatus for transmitting two frequency signals with an acoustic projector'1995 5,305,288'Variable reluctance acoustic projector'1994 5,216,888'Load transfer device for cryogenic application'1993 5,173,677'Superconducting magnetic energy storage system with low friction coil support'1992 5,126,979'Variable reluctance actuated flextension transducer'1992 5,067,044'Sensor for detecting a quench in a superconductor using an optical coupling'1991 4,982,571'Safety apparatus for superconducting magnetic energy stored system'1991 4,779,070'High energy toroidal inductor'1988 4,739,442'High current mechanical connect/disconnect switch'1988 4,713,642'Face connected instrument transformer'1987 4,683,353'Rotary switch for inductively driven rail gun systems'1987 4,639,700'Circuit interrupter with shock resistant mechanism'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–1995Patents assigned to WESTINGHOUSE ELECTRIC CORP (12)· patent assignee history

1987–1988Based in Wilkins Township, Allegheny County, PA, US· patent location history

1987Based in Penn Hills Township, Allegheny County, PA, US· patent location history

1991–1994Based in Murrysville, PA, US· patent location history

1995Based in Export, PA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
WESTINGHOUSE ELECTRIC CORP	12	1987–1995

Locations

Location	Patents	Span
Murrysville, Pennsylvania, US	6	1991–1994
Wilkins Township, Allegheny County, Pennsylvania, US	4	1987–1988
Export, Pennsylvania, US	1	1995
Penn Hills Township, Allegheny County, Pennsylvania, US	1	1987