For the Inventor, By the Inventor

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Delray Beach, FL, United States of America

St R&dtech LLC

USPTO Granted Patents = 6

Forward Citations = 0

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5 inventors (with patents filed for the assignee):

Steven Wayne Goldstein (3 out of 223 patents)

John Patrick Keady (3 out of 113 patents)

John Usher (2 out of 126 patents)

4. Dan Ellis (2 out of 10 patents)

5. John Usher (1 out of 1 patent)

6 patents: Sort by Forward Citations

1. 12425759 - Multi-mic earphone design and assembly (2025-09-23),

2. 12424235 - Method and device for spectral expansion for an audio signal (2025-09-23),

3. 12363223 - Real-time voice paging voice augmented caller ID/ring tone alias (2025-07-15),

4. 12268523 - Biometric, physiological or environmental monitoring using a closed chamber (2025-04-08),

5. 12236971 - Method and device for spectral expansion of an audio signal (2025-02-25),

6. 12080312 - Personal audio assistant device and method (2024-09-03),

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USPTO Data Jan 1 1976 - Dec 9 2025

6 Patents

#17 in Delray Beach, FL

#1,396 in Florida

#43,751 in US

Delray Beach, FL, United States of America

St R&dtech LLC

Forward Citations = 0

5 inventors:

Steven Wayne Goldstein (3 out of 223 patents)

John Patrick Keady (3 out of 113 patents)

John Usher (2 out of 126 patents)

4. Dan Ellis (2 out of 10 patents)

5. John Usher (1 out of 1 patent)

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