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For the Inventor, By the Inventor

Wareham, MA, United States of America

Lightspan, LLC


USPTO Granted Patents = 2

Forward Citations = 5

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1 inventor (with patents filed for the assignee):

goldMedal David S Stone (2 out of 3 patents)


2 patents:

1. 7139463 - Compositions and devices for thermooptically controlled switching and filtering (2006-11-21),
2. 6654188 - Compositions and devices for thermo optically controlled switching and filtering (2003-11-25),
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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#6 in Wareham, MA

#4,825 in Massachusetts

#92,623 in US

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Wareham, MA, United States of America

Lightspan, LLC

Forward Citations = 5

1 inventor:

goldMedal David S Stone (2 out of 3 patents)

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