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)

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. specializes in level measurement and control solutions for industries such as oil and gas, chemical processing, water and wastewater, pharmaceutical, and more. With over 50 years of experience, they offer reliable and accurate sensors, transmitters, switches, and controllers to ensure efficient and safe operations. Visit their website to learn more about their innovative solutions.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

26 Patents

#8 in Horsham, PA

#468 in Pennsylvania

#12,424 in US

#24,051 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)

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