Christian C. Petersen

Person

Westwood, MA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for precisely moving a motor armature
- Patent number 4,870,306
- Issue date Sep 26, 1989
- Polaroid Corporation
- Christian C. Petersen
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for controlling transducer
- Patent number 4,731,770
- Issue date Mar 15, 1988
- Polaroid Corporation
- Christian C. Petersen
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic position indicator and actuator using same
- Patent number 4,731,579
- Issue date Mar 15, 1988
- Polaroid Corporation
- Christian C. Petersen
- G01 - MEASURING TESTING
Information Patent Grant
Magnetic position indicator using multiple probes
- Patent number 4,658,214
- Issue date Apr 14, 1987
- Polaroid Corporation
- Christian C. Petersen
- G05 - CONTROLLING REGULATING
Information Patent Grant
Method of comminuting rare earth powder for producing rare earth ma...
- Patent number 4,641,787
- Issue date Feb 10, 1987
- Polaroid Corporation
- Christian C. Petersen
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Magnetic positioning and contouring of a blade mechanism
- Patent number 4,621,916
- Issue date Nov 11, 1986
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Film advancing and processing apparatus
- Patent number 4,558,936
- Issue date Dec 17, 1985
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Twin rotatable electromagnetically driven blade mechanism
- Patent number 4,558,938
- Issue date Dec 17, 1985
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electromagnetic blade mechanism
- Patent number 4,558,937
- Issue date Dec 17, 1985
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Apparatus for orienting magnetic particles in recording media
- Patent number 4,543,551
- Issue date Sep 24, 1985
- Polaroid Corporation
- Christian C. Petersen
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electromagnetic actuator generating equal and opposing force vectors
- Patent number 4,531,820
- Issue date Jul 30, 1985
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electromagnetic shutter mechanism
- Patent number 4,497,557
- Issue date Feb 5, 1985
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electromagnetic actuators
- Patent number 4,458,227
- Issue date Jul 3, 1984
- Polaroid Corporation
- Christian C. Petersen
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Camera motor belt drive system
- Patent number 4,433,273
- Issue date Feb 21, 1984
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Apparatus for continuously incrementing an output member
- Patent number 4,420,714
- Issue date Dec 13, 1983
- Polaroid Corporation
- Christian C. Petersen
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Camera shutter having bobbin driven blades
- Patent number 4,415,251
- Issue date Nov 15, 1983
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electric motor having improved operating characteristics
- Patent number 4,409,505
- Issue date Oct 11, 1983
- Polaroid Corporation
- Christian C. Petersen
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus which change magnetic forces of a linear motor
- Patent number 4,409,576
- Issue date Oct 11, 1983
- Polaroid Corporation
- Christian C. Petersen
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Efficient electromagnetic actuator usable as photographic shutter
- Patent number 4,407,578
- Issue date Oct 4, 1983
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Linear motor
- Patent number 4,363,980
- Issue date Dec 14, 1982
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Shutter blade drive system
- Patent number 4,265,530
- Issue date May 5, 1981
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Apparatus for automatically controlling transmission of light throu...
- Patent number 4,264,154
- Issue date Apr 28, 1981
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Intrusion alarm control system
- Patent number 4,227,188
- Issue date Oct 7, 1980
- Christian C. Petersen
- G08 - SIGNALLING
Information Patent Grant
Flip flash having final flash signal
- Patent number 4,158,879
- Issue date Jun 19, 1979
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Intrusion alarm control system
- Patent number 4,122,437
- Issue date Oct 24, 1978
- Cegg, Inc.
- Christian C. Petersen
- G08 - SIGNALLING
Information Patent Grant
Smoke detector
- Patent number 4,063,227
- Issue date Dec 13, 1977
- Cega, Inc.
- Christian C. Petersen
- G08 - SIGNALLING
Information Patent Grant
Inertia switch for anti-intrusion sensing systems
- Patent number 4,012,611
- Issue date Mar 15, 1977
- Cega, Inc.
- Christian C. Petersen
- G08 - SIGNALLING
Information Patent Grant
Galvano-magnetic effect control system for photographic apparatus
- Patent number 4,000,499
- Issue date Dec 28, 1976
- Polaroid Corporation
- Christian C. Petersen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Christian C. Petersen

Person

Patents Grantslast 30 patents

Method and apparatus for precisely moving a motor armature

Method and apparatus for controlling transducer

Magnetic position indicator and actuator using same

Magnetic position indicator using multiple probes

Method of comminuting rare earth powder for producing rare earth ma...

Magnetic positioning and contouring of a blade mechanism

Film advancing and processing apparatus

Twin rotatable electromagnetically driven blade mechanism

Electromagnetic blade mechanism

Apparatus for orienting magnetic particles in recording media

Electromagnetic actuator generating equal and opposing force vectors

Electromagnetic shutter mechanism

Electromagnetic actuators

Camera motor belt drive system

Apparatus for continuously incrementing an output member

Camera shutter having bobbin driven blades

Electric motor having improved operating characteristics

Method and apparatus which change magnetic forces of a linear motor

Efficient electromagnetic actuator usable as photographic shutter

Linear motor

Shutter blade drive system

Apparatus for automatically controlling transmission of light throu...

Intrusion alarm control system

Flip flash having final flash signal

Intrusion alarm control system

Smoke detector

Inertia switch for anti-intrusion sensing systems

Galvano-magnetic effect control system for photographic apparatus