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Erick O. Schonstedt
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Reston, VA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Magnetic cores for saturable core measuring devices and methods of...
Patent number
5,239,290
Issue date
Aug 24, 1993
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Methods, apparatus and devices relating to magnetic markers for elo...
Patent number
5,206,065
Issue date
Apr 27, 1993
Schonstedt Instrument Company
John B. Rippingale
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method for providing magnetic markers on elongated hidden objects
Patent number
5,173,139
Issue date
Dec 22, 1992
Schonstedt Instrument Company
John B. Rippingale
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method of manufacturing magnetic detection apparatus
Patent number
5,138,761
Issue date
Aug 18, 1992
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Magnetic detection apparatus with sensors mounted on channel or ang...
Patent number
5,136,245
Issue date
Aug 4, 1992
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Methods employing permanent magnets for marking, locating, tracing...
Patent number
5,122,750
Issue date
Jun 16, 1992
Schonstedt Instrument Company
John B. Rippingale
G02 - OPTICS
Information
Patent Grant
Methods, apparatus and devices relating to magnetic markers for elo...
Patent number
5,114,517
Issue date
May 19, 1992
Schonstedt Instrument Company
John B. Rippingale
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Magnetic detection appartaus with plastic housing and sound-transmi...
Patent number
5,097,211
Issue date
Mar 17, 1992
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Methods and apparatus employing permanent magnets for marking, loca...
Patent number
5,017,873
Issue date
May 21, 1991
Schonstedt Instrument Company
John B. Rippingale
G02 - OPTICS
Information
Patent Grant
Methods and apparatus employing permanent magnets for marking, loca...
Patent number
5,006,806
Issue date
Apr 9, 1991
Schonstedt Instrument Company
John B. Rippingale
G02 - OPTICS
Information
Patent Grant
Magnetic cores
Patent number
4,839,624
Issue date
Jun 13, 1989
Schonstedt Instrument Company
Erick O. Schonstedt
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Magnetic core blanks of magnetically permeable sheet material
Patent number
4,839,623
Issue date
Jun 13, 1989
Schonstedt Instrument Company
Erick O. Schonstedt
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Method of making magnetic cores
Patent number
4,803,773
Issue date
Feb 14, 1989
Schonstedt Instrument Company
Erick O. Schonstedt
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Manufacture of magnetic cores from blanks of magnetically permeable...
Patent number
4,747,207
Issue date
May 31, 1988
Schonstedt Instrument Company
Erick O. Schonstedt
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Magnetic detector apparatus with excitation conductors connected in...
Patent number
4,590,425
Issue date
May 20, 1986
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Magnetic detector apparatus with liquid-supported, conductive, sens...
Patent number
4,539,522
Issue date
Sep 3, 1985
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Multiaxis magnetometer apparatus with orthogonally disposed rectang...
Patent number
4,388,592
Issue date
Jun 14, 1983
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Apparatus and method employing foam sleeves for supporting magnetic...
Patent number
4,258,320
Issue date
Mar 24, 1981
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Magnetic locator
Patent number
D255552
Issue date
Jun 24, 1980
Schonstedt Instrument Company
Erick O. Schonstedt
D10 - Measuring, testing, or signalling instruments
Information
Patent Grant
Housing for circuitry and loudspeaker of a magnetic locator shields...
Patent number
4,163,877
Issue date
Aug 7, 1979
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Magnetic detecting apparatus with novel means for positioning senso...
Patent number
4,110,689
Issue date
Aug 29, 1978
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Method of manufacturing a magnetic locator
Patent number
3,977,072
Issue date
Aug 31, 1976
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING
Information
Patent Grant
Magnetic locator having improved sensors
Patent number
3,961,245
Issue date
Jun 1, 1976
Schonstedt Instrument Company
Erick O. Schonstedt
G01 - MEASURING TESTING