For the Inventor, By the Inventor

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Horsham, PA, United States of America

Drexelbrook Controls, Inc.

USPTO Granted Patents = 26

Forward Citations = 407

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21 inventors (with patents filed for the assignee):

Frederick L Maltby (20 out of 26 patents)

L Jonathan Kramer (10 out of 16 patents)

Steven R Petersen (8 out of 9 patents)

4. Kenneth M Loewenstern (6 out of 6 patents)

5. Jonathan L Kramer (4 out of 4 patents)

6. Herbert A Shauger, Jr (4 out of 9 patents)

7. Robert J Sun (3 out of 3 patents)

8. Jack G Benning, Jr (3 out of 3 patents)

9. David M Stern (2 out of 5 patents)

10. Howard S Hoopes (2 out of 6 patents)

11. Richard G Hall (2 out of 2 patents)

12. Norman Nardelli (1 out of 2 patents)

13. Yang Wang (1 out of 2 patents)

14. By Maureen Horrocks, Executrix (1 out of 1 patent)

15. Leslie D Horrocks, Deceased (1 out of 1 patent)

Core Competencies:

Sonic Measurement

Transducer Shroud

High Reliability Instruments

Condition Monitoring

Error Compensation

Liquid Level Sensing

RF Admittance

Probe Systems

Capacitor Probe

Multiple Set Points

Material Condition Monitoring

Continuous Sensing

26 patents: Sort by Forward Citations

1. 6062070 - Method and apparatus for the sonic measurement of sludge and clarity (2000-05-16),

2. 5835454 - Transducer shroud for improved transducer operation in the treatment of (1998-11-10),

3. 5777550 - High reliability instrument system (1998-07-07),

4. 5539670 - Coating responsive material condition monitoring system (1996-07-23),

5. 5510779 - Error compensating instrument system with digital communications (1996-04-23),

6. 5278513 - Continuous condition sensing system (1994-01-11),

7. 5045797 - Continuous condition sensing system determining liquid level by (1991-09-03),

8. 4950998 - Continuous condition sensing system (1990-08-21),

9. 4849754 - Remotely calibratable instrument system (1989-07-18),

10. 4799174 - Multiple set point condition monitoring systems (1989-01-17),

11. 4788488 - Continuous condition sensing system (1988-11-29),

12. 4757252 - Probe system for measuring the condition of materials (1988-07-12),

13. 4723122 - Remotely calibratable instrument system (1988-02-02),

14. 4568874 - RF Admittance apparatus and method for monitoring the contents of a pipe (1986-02-04),

15. 4511948 - Two layer probe (1985-04-16),

Drexelbrook Controls, Inc. is a leading provider of level and flow measurement solutions, specializing in innovative technologies for industrial applications. The company develops a range of products, including radar, ultrasonic, and capacitive level sensors, as well as flow meters, designed to meet the diverse needs of various sectors such as water and wastewater, chemical processing, and food and beverage industries. Headquartered in Horsham, PA, Drexelbrook is committed to delivering reliable and accurate measurement solutions that enhance operational efficiency.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

26 Patents

#9 in Horsham, PA

#469 in Pennsylvania

#12,850 in US

#24,781 in the World

Horsham, PA, United States of America

Drexelbrook Controls, Inc.

Forward Citations = 407

21 inventors:

Frederick L Maltby (20 out of 26 patents)

L Jonathan Kramer (10 out of 16 patents)

Steven R Petersen (8 out of 9 patents)

4. Kenneth M Loewenstern (6 out of 6 patents)

5. Jonathan L Kramer (4 out of 4 patents)

Please report any incorrect information to [email protected]

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