Douglas J. Hennenfent

Person

New Hope, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Sprocket crusher
- Patent number 5,580,006
- Issue date Dec 3, 1996
- Recyclights, Inc.
- Douglas J. Hennenfent
- B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
Information Patent Grant
Method for manufacturing a magnetic head core with a flux gap havin...
- Patent number 4,942,658
- Issue date Jul 24, 1990
- Magnetic Peripherals Inc.
- Timothy W. Vandnais
- G11 - INFORMATION STORAGE
Information Patent Grant
Granule vise for manufacturing a magnetic head core with a glass fi...
- Patent number 4,874,922
- Issue date Oct 17, 1989
- Impris Technology Incorporated
- Timothy W. Vadnais
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for calibrating a machining sensor
- Patent number 4,559,743
- Issue date Dec 24, 1985
- Magnetic Peripherals, Inc.
- Alan G. Kracke
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Precision lapping system
- Patent number 4,536,992
- Issue date Aug 27, 1985
- Magnetic Peripherals
- Douglas J. Hennenfent
- B24 - GRINDING POLISHING
Information Patent Grant
Method for attaching a workpiece to a workpiece carrier
- Patent number 4,517,041
- Issue date May 14, 1985
- Magnetic Peripherals Inc.
- Douglas J. Hennenfent
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Workpiece carrier
- Patent number 4,457,114
- Issue date Jul 3, 1984
- Magnetic Peripherals Inc.
- Douglas J. Hennenfent
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of aligning a precision grinding wheel assembly
- Patent number 4,297,781
- Issue date Nov 3, 1981
- Magnetic Peripherals Inc.
- Douglas J. Hennenfent
- B24 - GRINDING POLISHING
Information Patent Grant
Method of manufacturing narrow track ferrite head cores
- Patent number 4,279,102
- Issue date Jul 21, 1981
- Magnetic Peripherals Inc.
- Douglas J. Hennenfent
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Precision grinding wheel mount
- Patent number 4,236,355
- Issue date Dec 2, 1980
- Control Data Corporation
- Douglas J. Hennenfent
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of forming gaps in magnetic heads
- Patent number 4,182,643
- Issue date Jan 8, 1980
- Control Data Corporation
- Arthur Calderon
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of machining vise jaw face
- Patent number 4,006,525
- Issue date Feb 8, 1977
- Control Data Corporation
- Douglas J. Hennenfent
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Magnetic read head with offset flux gaps
- Patent number 3,986,209
- Issue date Oct 12, 1976
- Control Data Corporation
- Harold James Beecroft
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic transducer head core manufacturing method
- Patent number 3,982,318
- Issue date Sep 28, 1976
- Control Data Corporation
- Douglas Joseph Hennenfent
- G11 - INFORMATION STORAGE
Information Patent Grant
Resilient vise jaw
- Patent number 3,951,395
- Issue date Apr 20, 1976
- Control Data Corporation
- Douglas J. Hennenfent
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS

Douglas J. Hennenfent

Person

Patents Grantslast 30 patents

Sprocket crusher

Method for manufacturing a magnetic head core with a flux gap havin...

Granule vise for manufacturing a magnetic head core with a glass fi...

Method for calibrating a machining sensor

Precision lapping system

Method for attaching a workpiece to a workpiece carrier

Workpiece carrier

Method of aligning a precision grinding wheel assembly

Method of manufacturing narrow track ferrite head cores

Precision grinding wheel mount

Method of forming gaps in magnetic heads

Method of machining vise jaw face

Magnetic read head with offset flux gaps

Magnetic transducer head core manufacturing method

Resilient vise jaw