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For the Inventor, By the Inventor

Alhambra, CA, United States of America

Hiefo Corporation


USPTO Granted Patents = 3

Forward Citations = 0

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2 inventors (with patents filed for the assignee):

goldMedal Henry A Blauvelt (3 out of 75 patents)

silverMedal Wei Hsin (2 out of 2 patents)


3 patents:

1. 12456849 - Semiconductor waveguide optical gain device with lateral current confinement or optical mode shaping (2025-10-28),
2. 12431690 - Semiconductor waveguide optical gain device with optical mode shaping (2025-09-30),
3. 12355211 - Semiconductor waveguide optical gain device with optical mode shaping (2025-07-08),
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USPTO Data Jan 1 1976 - Dec 30 2025

3 Patents

#15 in Alhambra, CA

#16,428 in California

#72,042 in US

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Alhambra, CA, United States of America

Hiefo Corporation

Forward Citations = 0

2 inventors:

goldMedal Henry A Blauvelt (3 out of 75 patents)

silverMedal Wei Hsin (2 out of 2 patents)

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