Randy J. Longsdorf

Person

Chaska, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Process device with supervisory overlayer
- Patent number 8,180,466
- Issue date May 15, 2012
- Rosemount Inc.
- Randy Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Grant
Process device with diagnostic annunciation
- Patent number 7,991,582
- Issue date Aug 2, 2011
- Rosemount Inc.
- Randy Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Grant
Dedicated process diagnostic device
- Patent number 7,630,861
- Issue date Dec 8, 2009
- Rosemount Inc.
- Randy J. Longsdorf
- G08 - SIGNALLING
Information Patent Grant
Process device with vibration based diagnostics
- Patent number 7,627,441
- Issue date Dec 1, 2009
- Rosemount Inc.
- Randy J. Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Grant
Process equipment validation
- Patent number 7,464,721
- Issue date Dec 16, 2008
- Rosemount Inc.
- Dale Perry
- G05 - CONTROLLING REGULATING
Information Patent Grant
Two-wire process control loop diagnostics
- Patent number 7,321,846
- Issue date Jan 22, 2008
- Rosemount Inc.
- Garrie D. Huisenga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Process control loop current verification
- Patent number 7,280,048
- Issue date Oct 9, 2007
- Rosemount Inc.
- Randy J. Longsdorf
- G08 - SIGNALLING
Information Patent Grant
Process device with loop override
- Patent number 7,098,798
- Issue date Aug 29, 2006
- Rosemount Inc.
- Garrie Huisenga
- G08 - SIGNALLING
Information Patent Grant
Process device with quiescent current diagnostics
- Patent number 7,018,800
- Issue date Mar 28, 2006
- Rosemount Inc.
- Garrie D. Huisenga
- G08 - SIGNALLING
Information Patent Grant
Process transmitter communication circuit
- Patent number 6,006,338
- Issue date Dec 21, 1999
- Rosemont Inc.
- Randy J. Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Grant
Microwave level gauge with remote transducer
- Patent number 5,847,567
- Issue date Dec 8, 1998
- Rosemount Inc.
- John A. Kielb
- G01 - MEASURING TESTING
Information Patent Grant
Barrier device
- Patent number 5,710,552
- Issue date Jan 20, 1998
- Rosemount Inc.
- Steven J. McCoy
- G01 - MEASURING TESTING
Information Patent Grant
Interface controller for matching a process address field from a pl...
- Patent number 5,410,730
- Issue date Apr 25, 1995
- Rosemount Inc.
- Randy J. Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Grant
Lightning protection for field mounted instruments
- Patent number 5,323,289
- Issue date Jun 21, 1994
- Rosemount Inc.
- Randy J. Longsdorf
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Two-wire transmitter with threshold detection circuit
- Patent number 4,804,958
- Issue date Feb 14, 1989
- Rosemount Inc.
- Randy J. Longsdorf
- G08 - SIGNALLING

Patents Applicationslast 30 patents

Information Patent Application
Dedicated process diagnostic device
- Publication number 20070010968
- Publication date Jan 11, 2007
- Randy J. Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Application
Process device with diagnostic annunciation
- Publication number 20060069455
- Publication date Mar 30, 2006
- Rosemount Inc.
- Randy J. Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Application
Process equipment validation
- Publication number 20050274417
- Publication date Dec 15, 2005
- Rosemount Inc.
- Dale H. Perry
- G05 - CONTROLLING REGULATING
Information Patent Application
Process control loop current verification
- Publication number 20050168343
- Publication date Aug 4, 2005
- Randy J. Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Application
Process device with supervisory overlayer
- Publication number 20050113942
- Publication date May 26, 2005
- Rosemount Inc.
- Randy J. Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Application
Process device with vibration based diagnostics
- Publication number 20050072239
- Publication date Apr 7, 2005
- Randy J. Longsdorf
- G05 - CONTROLLING REGULATING
Information Patent Application
Process device with loop override
- Publication number 20050030186
- Publication date Feb 10, 2005
- Garrie D. Huisenga
- G05 - CONTROLLING REGULATING
Information Patent Application
Process device with quiescent current diagnostics
- Publication number 20050030185
- Publication date Feb 10, 2005
- Garrie D. Huisenga
- G05 - CONTROLLING REGULATING

Randy J. Longsdorf

Person

Patents Grantslast 30 patents

Process device with supervisory overlayer

Process device with diagnostic annunciation

Dedicated process diagnostic device

Process device with vibration based diagnostics

Process equipment validation

Two-wire process control loop diagnostics

Process control loop current verification

Process device with loop override

Process device with quiescent current diagnostics

Process transmitter communication circuit

Microwave level gauge with remote transducer

Barrier device

Interface controller for matching a process address field from a pl...

Lightning protection for field mounted instruments

Two-wire transmitter with threshold detection circuit

Patents Applicationslast 30 patents

Dedicated process diagnostic device

Process device with diagnostic annunciation

Process equipment validation

Process control loop current verification

Process device with supervisory overlayer

Process device with vibration based diagnostics

Process device with loop override

Process device with quiescent current diagnostics