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For the Inventor, By the Inventor

Del Valle, TX, United States of America

Piedra-Sombra Corporation, Inc.


USPTO Granted Patents = 3

Trademarks = 3

Forward Citations = 18

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2 inventors (with patents filed for the assignee):

goldMedal William C Stone (3 out of 37 patents)

silverMedal Bartholomew P Hogan (3 out of 20 patents)


3 patents:

1. RE46054 - Underwater vehicle with sonar array (2016-07-04),
2. 9383520 - Optical power transfer system for powering a remote mobility system for multiple missions (2016-07-05),
3. 9090315 - Optical energy transfer and conversion system (2015-07-28),
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USPTO Data Jan 1 1976 - Jan 6 2026

3 Patents

#2 in Del Valle, TX

#4,692 in Texas

#72,066 in US

...
Del Valle, TX, United States of America

Piedra-Sombra Corporation, Inc.

Forward Citations = 18

2 inventors:

goldMedal William C Stone (3 out of 37 patents)

silverMedal Bartholomew P Hogan (3 out of 20 patents)

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