For the Inventor, By the Inventor

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Huntingdon Valley, PA, United States of America

The Fredericks Company

USPTO Granted Patents = 9

% Expired Patents = 11.1

CIPO Patents = 1

Forward Citations = 104

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14 inventors (with patents filed for the assignee):

Emil Drubetsky (3 out of 3 patents)

Joseph J Seipp, Jr (2 out of 2 patents)

Wallace R Crossan, Jr (2 out of 2 patents)

4. Donald R Taylor, Jr (2 out of 2 patents)

5. Andrew Ruether (1 out of 1 patent)

6. Lester E Burgess (1 out of 33 patents)

7. Bruce R F Kendall (1 out of 2 patents)

8. Charles E Greway (1 out of 1 patent)

9. Ronald H Goehner, Jr (1 out of 7 patents)

10. Howard M Brady (1 out of 1 patent)

11. Barry E Barsky (1 out of 7 patents)

12. Francis R Kull (1 out of 1 patent)

13. Leonard Woshczyn (1 out of 1 patent)

14. William R Keller (1 out of 1 patent)

9 patents: Sort by Forward Citations

1. 7886451 - Integral electrode tilt sensor and method for making same (2011-02-15),

2. 6688013 - Electrolytic-tilt-sensor (2004-02-10),

3. 6453571 - Thermocouple tilt sensing device (2002-09-24),

4. 6257069 - Bayard-alpert vacuum gauge with neutralization of x-ray effect (2001-07-10),

5. 6249984 - Electrolytic tilt sensor having a metallic envelope (2001-06-26),

6. 5852878 - Electrolytic tilt sensing device (1998-12-29),

7. 5630280 - Dual axis electrolytic tilt sensor (1997-05-20),

8. 5568053 - Ionization gauge having a non-time varying magnetic field generator of (1996-10-22),

9. 5351551 - Convection thermocouple vacuum gauge (1994-10-04),

The Fredericks Company is a leading manufacturer of precision measurement and control products. With over 80 years of experience, we provide innovative solutions for industries such as aerospace, defense, and industrial automation. Our products include inclinometers, tilt sensors, and custom systems designed to meet the unique needs of our customers.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

9 Patents

#2 in Huntingdon Valley, PA

#1,189 in Pennsylvania

#32,565 in US

Huntingdon Valley, PA, United States of America

The Fredericks Company

Forward Citations = 104

14 inventors:

Emil Drubetsky (3 out of 3 patents)

Joseph J Seipp, Jr (2 out of 2 patents)

Wallace R Crossan, Jr (2 out of 2 patents)

4. Donald R Taylor, Jr (2 out of 2 patents)

5. Andrew Ruether (1 out of 1 patent)

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