# Hilliard B. Siegel — Patents explained on PatentBrief

Hilliard B. Siegel has 1 landmark patent explained in plain English on PatentBrief.

- [How to Buy Digital Media Once and Get Multiple Formats](https://patentbrief.org/patent/us/7877330/kindle-e-reader) — granted 2011
  A system that lets you pay for a digital file once and download it in different formats from various providers without paying again.

**Full profile:** https://patentbrief.org/inventor/hilliard-b-siegel

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