Source web Tier B
USPTO, Inventors who changed the world: Marian Rogers Croak
United States Patent and Trademark Office, 'Inventors who changed the world' profile of Marian Rogers Croak, Ph.D., born May 14, 1955, in New York, New York: developed inventions that made phone calls more reliably and securely transmittable over the internet; a pioneer in the advancement of Voice over Internet Protocol (VoIP); holds over 200 patents.
Custody docket
- Record
- uspto-marian-croak
- Type
- web
- Trust tier
- B
- Status
- published
Sources are graded A (primary) / B (secondary academic) / C (secondary journalism) / D (tertiary or contested). See the manifesto’s Evidence Standard for full criteria.
The patent office’s own inventor profile, read 2026-09-23.
Provenance
- Creator
- United States Patent and Trademark Office
- Accessed
- 2026-09-23
- External record
- https://www.uspto.gov/kids/inventors-change-world
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