For the Inventor, By the Inventor

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Columbus, OH, United States of America

Ranco Inc.

USPTO Granted Patents = 59

% Expired Patents = 1.7

Trademarks = 5

Forward Citations = 788

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54 inventors (with patents filed for the assignee):

Guglielmo Rossi (13 out of 14 patents)

Gunter Piesche (4 out of 5 patents)

Roland B Caldwell (3 out of 3 patents)

4. Russell G Attridge, Jr (3 out of 3 patents)

5. Merlin E Demaray (3 out of 3 patents)

6. Robert F Purssell (3 out of 4 patents)

7. Pandu R Cholkeri (3 out of 6 patents)

8. William D Kramer (2 out of 8 patents)

9. Brian Enderle (2 out of 3 patents)

10. William Peter Tanguay (2 out of 17 patents)

11. Lee A White (2 out of 3 patents)

12. William J Houk (2 out of 2 patents)

13. Themistocles H Gliatas (2 out of 2 patents)

14. Vincenzo Ferloni (2 out of 2 patents)

15. Mario Gemma (2 out of 3 patents)

Core Competencies:

Diagnostic Devices

Alarm Synchronization

Temperature Sensing

Pressure Control

Refrigeration Systems

Turbocharger Control

Fluid Flow Control

Heating Systems

Snap Action Switches

EGR Control Systems

On/Off Solenoid Devices

Defrost Control

59 patents: Sort by Forward Citations

1. 6862589 - System and method for performing diagnostics using a portable device displaying diagnostic data using templates (2005-03-01),

2. 6751978 - Transition fitting (2004-06-22),

3. 6614347 - Apparatus and method for providing alarm synchronization among multiple alarm devices (2003-09-02),

4. 6378328 - Blow-off orifice tube (2002-04-30),

5. 6374624 - On/off solenoid expansion device (2002-04-23),

6. 6367283 - Three-stage electronically variable orifice tube (2002-04-09),

7. 5966078 - Battery saving circuit for a dangerous condition warning device (1999-10-12),

8. 4882908 - Demand defrost control method and apparatus (1989-11-28),

9. 4881057 - Temperature sensing apparatus and method of making same (1989-11-14),

10. 4800292 - Temperature sensing circuit (1989-01-24),

11. 4745385 - Switching relays (1988-05-17),

12. 4737604 - Three stage pressure switch (1988-04-12),

13. 4721937 - Temperature responsive switch (1988-01-26),

14. 4712582 - Reversing valve assembly with improved pilot valve mounting structure (1987-12-15),

15. 4703625 - Turbocharger control system (1987-11-03),

Ranco Inc. is a leading provider of innovative solutions for the manufacturing industry. With over 50 years of experience, we specialize in developing and manufacturing cutting-edge machinery and equipment for various industries including automotive, aerospace, and electronics. Our commitment to excellence and continuous improvement has earned us a reputation for delivering high-quality products that meet the ever-evolving needs of our customers. Visit our website to learn more about our extensive product range and how we can help optimize your manufacturing processes.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

59 Patents

#14 in Columbus, OH

#269 in Ohio

#6,062 in US

#12,205 in the World

Columbus, OH, United States of America

Ranco Inc.

Forward Citations = 788

54 inventors:

Guglielmo Rossi (13 out of 14 patents)

Gunter Piesche (4 out of 5 patents)

Roland B Caldwell (3 out of 3 patents)

4. Russell G Attridge, Jr (3 out of 3 patents)

5. Merlin E Demaray (3 out of 3 patents)

Please report any incorrect information to [email protected]

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