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For the Inventor, By the Inventor

Wilmington, DE, United States of America

Ranco Inc.


USPTO Granted Patents = 59

Trademarks = 5

Forward Citations = 783

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54 inventors (with patents filed for the assignee):

goldMedal Guglielmo Rossi (13 out of 14 patents)

silverMedal Gunter Piesche (4 out of 5 patents)

bronzeMedal 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:

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.

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USPTO Data Jan 1 1976 - Dec 16 2025

59 Patents

#85 in Wilmington, DE

#106 in Delaware

#5,865 in US

#11,822 in the World

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Wilmington, DE, United States of America

Ranco Inc.

Forward Citations = 783

54 inventors:

goldMedal Guglielmo Rossi (13 out of 14 patents)

silverMedal Gunter Piesche (4 out of 5 patents)

bronzeMedal 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)

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