# William D Coolidge — Patents explained on PatentBrief

William D Coolidge has 1 landmark patent explained in plain English on PatentBrief.

- [How William Coolidge Invented the Modern X-Ray Tube](https://patentbrief.org/patent/us/1203495/coolidge-x-ray-tube) — granted 1916
  A 1916 patent by William Coolidge for a high-vacuum X-ray tube that used a heated tungsten filament to control electron flow, replacing older, unreliable gas-filled tubes.

**Full profile:** https://patentbrief.org/inventor/william-d-coolidge

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_Source: PatentBrief — https://patentbrief.org. Plain-English explanations of US patents._