For the Inventor, By the Inventor

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Vaduz, Liechtenstein

Spandrel Establishment

USPTO Granted Patents = 3

Forward Citations = 29

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4 inventors (with patents filed for the assignee):

Martin P Smith (3 out of 17 patents)

Christopher M Welbourn (2 out of 11 patents)

Andrew D Stewart (1 out of 11 patents)

4. Colin D Saunders (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 5010247 - Method of classifying objects according to shape (1991-04-23),

2. 4663522 - Integrating sphere device for measuring transmission of light in objects (1987-05-05),

3. 4645922 - Integrating sphere arrangement for producing size-corrected color signals (1987-02-24),

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USPTO Data Jan 1 1976 - Dec 9 2025

3 Patents

#31 in Vaduz

#77 in Liechtenstein

Vaduz, Liechtenstein

Spandrel Establishment

Forward Citations = 29

4 inventors:

Martin P Smith (3 out of 17 patents)

Christopher M Welbourn (2 out of 11 patents)

Andrew D Stewart (1 out of 11 patents)

4. Colin D Saunders (1 out of 1 patent)

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