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Hudsonville, MI, United States of America

Conrac Corporation

USPTO Granted Patents = 13

EPO Patents = 1

Trademarks = 1

Forward Citations = 236

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14 inventors (with patents filed for the assignee):

Mark B Siehling (2 out of 2 patents)

Stanley R Van Antwerp (2 out of 2 patents)

Hilario S Costa (2 out of 2 patents)

4. John M Macmillan (2 out of 2 patents)

5. Dan N Ciocan (2 out of 2 patents)

6. Gary Edward Holt (1 out of 4 patents)

7. Frank D Roberts (1 out of 2 patents)

8. Frans Brouwer (1 out of 15 patents)

9. James E Westbrook (1 out of 1 patent)

10. J Hardy House (1 out of 1 patent)

11. Joe F Guess (1 out of 3 patents)

12. Eugene F Lagasse (1 out of 1 patent)

13. Paul M Thomsen (1 out of 1 patent)

14. Elmer M Bruce (1 out of 1 patent)

15. Jürgen Bernhardt (0 patent)

13 patents: Sort by Forward Citations

1. 4943904 - D.C. power unit assembly including unitized single-phase D.C. power units (1990-07-24),

2. 4803754 - Electromechanical door holder-closer (1989-02-14),

3. 4705992 - System for stabilizing cathode emissions with an in-line gun cathode ray (1987-11-10),

4. 4700218 - Automated system for adjustment of the white balance in a signal (1987-10-13),

5. 4682000 - Welding transformer and rectifier assembly (1987-07-21),

6. D260498 - Smoke detector housing (1981-09-01),

7. 4238679 - Dual-chamber ionization smoke detector assembly (1980-12-09),

8. 4127840 - Solid state force transducer (1978-11-28),

9. 4110561 - Communication unit for code generation and voice communication (1978-08-29),

10. 4090030 - Antenna mount and connector (1978-05-16),

11. 4087799 - Particulate products of combustion detector employing solid state (1978-05-02),

12. D246899 - Combined microphone gooseneck adapter and switch therefor (1978-01-10),

13. 4045620 - Digital tone detector (1977-08-30),

Conrac Corporation is a leading provider of innovative technology solutions for the transportation industry. With a focus on design, construction, and management of consolidated rental car facilities (ConRACs) at major airports, Conrac Corporation ensures a seamless and efficient rental car experience for travelers. The company's expertise in project development, financing, and operations makes them a trusted partner for airport authorities and rental car companies alike.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

13 Patents

#3 in Hudsonville, MI

#827 in Michigan

#23,162 in US

#43,714 in the World

Hudsonville, MI, United States of America

Conrac Corporation

Forward Citations = 236

14 inventors:

Mark B Siehling (2 out of 2 patents)

Stanley R Van Antwerp (2 out of 2 patents)

Hilario S Costa (2 out of 2 patents)

4. John M Macmillan (2 out of 2 patents)

5. Dan N Ciocan (2 out of 2 patents)

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