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Forward Citations = 63

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3 inventors (with patents filed for the assignee):

Vernon R Fencl (9 out of 13 patents)

Laszlo J Javorik (4 out of 5 patents)

Archie Tan (2 out of 2 patents)

11 patents: Sort by Forward Citations

1. 4975556 - Butt welding machine (1990-12-04),

2. 4722216 - Radial forging method (1988-02-02),

3. 4685323 - Method for increasing the buckling load capacity and the comprehensive (1987-08-11),

4. 4590655 - Method for expanding a tubular member (1986-05-27),

5. 4562326 - Machine for welding automotive wheel rim blanks (1985-12-31),

6. 4559482 - Automotive rim roll forming drive system (1985-12-17),

7. 4472959 - Removable multi-die cartridge for shrink forming machine (1984-09-25),

8. 4357561 - Automotive rim roll forming drive system (1982-11-02),

9. 4320327 - Automotive rim roll forming drive system (1982-03-16),

10. 4316377 - Roll forging machine (1982-02-23),

11. 4306437 - System for planishing metal pipe (1981-12-22),

Grotnes Metalforming Systems, Inc. is a leading provider of custom metalforming solutions. With over 75 years of experience, we offer a wide range of innovative machinery and equipment for various industries such as automotive, aerospace, and construction. Our state-of-the-art technology and advanced engineering capabilities ensure high-quality products and efficient production processes for our clients worldwide.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

11 Patents

#307 in Chicago, IL

#1,297 in Illinois

#26,691 in US

#50,190 in the World

Chicago, IL, United States of America

Grotnes Metalforming Systems, Inc.

Forward Citations = 63

3 inventors:

Vernon R Fencl (9 out of 13 patents)

Laszlo J Javorik (4 out of 5 patents)

Archie Tan (2 out of 2 patents)

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