For the Inventor, By the Inventor

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Chicago, IL, United States of America

Ardco, Inc.

USPTO Granted Patents = 35

% Expired Patents = 2.9

Forward Citations = 1,083

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30 inventors (with patents filed for the assignee):

Melvin C Kaspar (12 out of 12 patents)

Gerald J Bockwinkel (7 out of 7 patents)

Paul J Artwohl (7 out of 7 patents)

4. Matthew Rolek (6 out of 6 patents)

5. Jeffery T Kostos (4 out of 4 patents)

6. Robert G O'Neal (3 out of 5 patents)

7. Kenneth E Vogel (3 out of 8 patents)

8. Richard A Mamelson (3 out of 3 patents)

9. Francis M Niekrasz (3 out of 3 patents)

10. Douglas B Laird (2 out of 2 patents)

11. David Robinson (2 out of 2 patents)

12. Frank M Niekrasz (2 out of 3 patents)

13. Richard C Kim (1 out of 4 patents)

14. Damon Floyd Kvamme (1 out of 30 patents)

15. Christopher D Hensch (1 out of 1 patent)

35 patents: Sort by Forward Citations

1. 6481231 - Hot gas defrost refrigeration system (2002-11-19),

2. 6286322 - Hot gas defrost refrigeration system (2001-09-11),

3. 6125652 - Apparatus for minimizing refrigerant usage (2000-10-03),

4. 5715889 - Heat exchanger and the method for producing same (1998-02-10),

5. 5645330 - Refrigerated display cabinets with improved mullion assembly (1997-07-08),

6. 5622414 - Refrigerator display cabinet with thermally insulated pivotable all (1997-04-22),

7. 5471372 - Lighting system for commercial refrigerator doors (1995-11-28),

8. 5255473 - Refrigerator door assembly with stylized substantially all glass front (1993-10-26),

9. 5244273 - Door hold-open device (1993-09-14),

10. 5214877 - Refrigerator door assembly with venting system (1993-06-01),

11. 5207490 - Safety latch for the lid of a lift-top cabinet (1993-05-04),

12. 5161289 - Header machine (1992-11-10),

13. 5129246 - Tubing expander (1992-07-14),

14. 5116274 - Refrigerator display cabinet with thermally insulated pivotable window (1992-05-26),

15. 5111618 - Refrigerator door assembly with stylized substantially all glass front (1992-05-12),

Ardco, Inc. is a leading global provider of industrial equipment and solutions. With extensive experience in the industry, Ardco offers a wide range of innovative products designed for various sectors including construction, mining, agriculture, and more. From customized vehicles and machinery to advanced technology solutions, Ardco strives to meet the unique needs of its clients. Visit our website to learn more about our comprehensive product catalogue and find the perfect solution for your business.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

35 Patents

#136 in Chicago, IL

#538 in Illinois

#9,736 in US

#19,137 in the World

Chicago, IL, United States of America

Ardco, Inc.

Forward Citations = 1,083

30 inventors:

Melvin C Kaspar (12 out of 12 patents)

Gerald J Bockwinkel (7 out of 7 patents)

Paul J Artwohl (7 out of 7 patents)

4. Matthew Rolek (6 out of 6 patents)

5. Jeffery T Kostos (4 out of 4 patents)

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