For the Inventor, By the Inventor

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Delray Beach, FL, United States of America

St R&dtech LLC

USPTO Granted Patents = 9

Forward Citations = 0

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6 inventors (with patents filed for the assignee):

Steven Wayne Goldstein (4 out of 232 patents)

John Usher (4 out of 138 patents)

John Patrick Keady (4 out of 115 patents)

4. Dan Ellis (2 out of 10 patents)

5. Steve Goldstein (1 out of 11 patents)

6. John Usher (1 out of 3 patents)

9 patents: Sort by Forward Citations

1. 12646522 - Personal audio assistant device and method (2026-06-02),

2. 12591407 - Robust voice activity detector system for use with an earphone (2026-03-31),

3. 12574675 - Acoustic device and method (2026-03-10),

4. 12425759 - Multi-mic earphone design and assembly (2025-09-23),

5. 12424235 - Method and device for spectral expansion for an audio signal (2025-09-23),

6. 12363223 - Real-time voice paging voice augmented caller ID/ring tone alias (2025-07-15),

7. 12268523 - Biometric, physiological or environmental monitoring using a closed chamber (2025-04-08),

8. 12236971 - Method and device for spectral expansion of an audio signal (2025-02-25),

9. 12080312 - Personal audio assistant device and method (2024-09-03),

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USPTO Data Jan 1 1976 - Sep 29 2026

9 Patents

#12 in Delray Beach, FL

#972 in Florida

#32,549 in US

Delray Beach, FL, United States of America

St R&dtech LLC

Forward Citations = 0

6 inventors:

Steven Wayne Goldstein (4 out of 232 patents)

John Usher (4 out of 138 patents)

John Patrick Keady (4 out of 115 patents)

4. Dan Ellis (2 out of 10 patents)

5. Steve Goldstein (1 out of 11 patents)

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