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For the Inventor, By the Inventor

Monroeville, PA, United States of America

Graystone Corporation


USPTO Granted Patents = 3

Trademarks = 10

Forward Citations = 20

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2 inventors (with patents filed for the assignee):

goldMedal Franz Allmer (3 out of 6 patents)

silverMedal Robert A Weber (1 out of 1 patent)


3 patents:

1. 4096806 - Track tamper with hingeable unitary pivotable tamping unit (1978-06-27),
2. 4092903 - Vibratory drive mechanism (1978-06-06),
3. 4068595 - Track tamper (1978-01-17),
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USPTO Data Jan 1 1976 - Sep 29 2026

3 Patents

#5 in Monroeville, PA

#2,678 in Pennsylvania

#73,766 in US

Monroeville, PA (US)
Monroeville, PA, United States of America

Graystone Corporation

Forward Citations = 20

2 inventors:

goldMedal Franz Allmer (3 out of 6 patents)

silverMedal Robert A Weber (1 out of 1 patent)

Please report any incorrect information to [email protected]
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