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For the Inventor, By the Inventor

Mercersburg, PA, United States of America

Spessard Manufacturing, LLC


USPTO Granted Patents = 1

Forward Citations = 4

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5 inventors (with patents filed for the assignee):

goldMedal John Robertson Rzasa (1 out of 4 patents)

silverMedal Christopher C Davis (1 out of 17 patents)

bronzeMedal Leroy B Chamberlain, Jr (1 out of 1 patent)

4.  Jakob R Scharmer (1 out of 1 patent)

5.  Gerald W Spessard (1 out of 3 patents)


1 patent:

1. 9352208 - Electronic home plate for baseball and softball games and method for automatic determination of presence, position and speed of a ball relative to the strike zone (2016-05-31),
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USPTO Data Jan 1 1976 - Jan 13 2026

1 Patents

#2 in Mercersburg, PA

#4,875 in Pennsylvania

#134,032 in US

...
Mercersburg, PA, United States of America

Spessard Manufacturing, LLC

Forward Citations = 4

5 inventors:

goldMedal John Robertson Rzasa (1 out of 4 patents)

silverMedal Christopher C Davis (1 out of 17 patents)

bronzeMedal Leroy B Chamberlain, Jr (1 out of 1 patent)

4.  Jakob R Scharmer (1 out of 1 patent)

5.  Gerald W Spessard (1 out of 3 patents)

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