For the Inventor, By the Inventor

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Dallas, TX, United States of America

Zia Patent Company

USPTO Granted Patents = 3

Forward Citations = 42

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4 inventors (with patents filed for the assignee):

Norman L Kotraba (3 out of 8 patents)

N Edward Bottinelli (2 out of 7 patents)

Carl A Holley (1 out of 15 patents)

4. Norman G Bishop (1 out of 9 patents)

3 patents: Sort by Forward Citations

1. 5186741 - Direct reduction process in a rotary hearth furnace (1993-02-16),

2. 5164147 - Heat treating furnace (1992-11-17),

3. 5028034 - Continuous feed shaft retort appartus for recovery of non-ferrous metals (1991-07-02),

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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#565 in Dallas, TX

#4,679 in Texas

#71,958 in US

Dallas, TX, United States of America

Zia Patent Company

Forward Citations = 42

4 inventors:

Norman L Kotraba (3 out of 8 patents)

N Edward Bottinelli (2 out of 7 patents)

Carl A Holley (1 out of 15 patents)

4. Norman G Bishop (1 out of 9 patents)

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