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Granville T. Woods Patent Collection

Granville T. Woods

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1884

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Innovators

3-Minute Summary

Woods held over 50 patents in electrical engineering, including the Synchronous Multiplex Railway Telegraph (1887) — a system for communicating between moving trains and stations that prevented collisions. He successfully defended his patents against Thomas Edison in court.

Why It Matters

Woods's railway telegraph system saved lives and transformed American rail safety. His successful patent defense against Edison — twice — established that a Black inventor could protect his intellectual property in American courts.

Where to Read

USPTO Patent Full-Text Database (free)

Verified: USPTO

Key People

Granville T. Woods

Thomas Edison

American Bell Telephone Company

Key Policies & Events

Patent lawRailway safety regulationsElectrical engineering standards