For the Inventor, By the Inventor

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Stafford, United Kingdom

Unicorn Abrasives Limited

USPTO Granted Patents = 3

% Expired Patents = 33.3

Trademarks = 2

Forward Citations = 8

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6 inventors (with patents filed for the assignee):

John Tunstall (1 out of 7 patents)

Jay Merkle (1 out of 1 patent)

Donald McHugh (1 out of 1 patent)

4. George Laskaris (1 out of 1 patent)

5. James Edward Sanders (1 out of 1 patent)

6. Donald Raymond McHugh (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 6544106 - Dressing of grinding wheels (2003-04-08),

2. 6213860 - Grinding wheel (2001-04-10),

3. 5647788 - Dressing of grinding wheels (1997-07-15),

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USPTO Data Jan 1 1976 - Sep 29 2026

3 Patents

#3 in Stafford

#4,886 in United Kingdom

Stafford, United Kingdom

Unicorn Abrasives Limited

Forward Citations = 8

6 inventors:

John Tunstall (1 out of 7 patents)

Jay Merkle (1 out of 1 patent)

Donald McHugh (1 out of 1 patent)

4. George Laskaris (1 out of 1 patent)

5. James Edward Sanders (1 out of 1 patent)

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