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For the Inventor, By the Inventor

Elk Grove Village, IL, United States of America

Service Tool International, Inc.


USPTO Granted Patents = 3

Forward Citations = 11

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3 inventors (with patents filed for the assignee):

goldMedal Frank J Herdzina (2 out of 2 patents)

silverMedal Frank J Herdzina, Jr (1 out of 17 patents)

bronzeMedal Steven F Herdzina (1 out of 1 patent)


3 patents:

1. 5329800 - Conversion system having conveyor slide assembly for multiple belts (1994-07-19),
2. 5284045 - End tooling for multiple end diameters (1994-02-08),
3. 5277047 - Conversion system tooling heater (1994-01-11),
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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#79 in Elk Grove Village, IL

#3,360 in Illinois

#71,953 in US

...
Elk Grove Village, IL, United States of America

Service Tool International, Inc.

Forward Citations = 11

3 inventors:

goldMedal Frank J Herdzina (2 out of 2 patents)

silverMedal Frank J Herdzina, Jr (1 out of 17 patents)

bronzeMedal Steven F Herdzina (1 out of 1 patent)

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