For the Inventor, By the Inventor

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Holland, MI, United States of America

Prince Machine Corporation

USPTO Granted Patents = 3

Forward Citations = 8

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4 inventors (with patents filed for the assignee):

Robert W Hegel (3 out of 5 patents)

Jon R Mullen (2 out of 6 patents)

Melvin C Hawke (2 out of 2 patents)

4. William P Damian (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 5632321 - Die casting machine with compound docking/shot cylinder (1997-05-27),

2. 5553659 - Die casting machine with safety bar (1996-09-10),

3. 5284201 - Vertical shot mechanism for die casting machine (1994-02-08),

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USPTO Data Jan 1 1976 - Dec 30 2025

3 Patents

#48 in Holland, MI

#2,448 in Michigan

#72,042 in US

Holland, MI, United States of America

Prince Machine Corporation

Forward Citations = 8

4 inventors:

Robert W Hegel (3 out of 5 patents)

Jon R Mullen (2 out of 6 patents)

Melvin C Hawke (2 out of 2 patents)

4. William P Damian (1 out of 1 patent)

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