# Earle C Haas — Patents explained on PatentBrief

Earle C Haas has 1 landmark patent explained in plain English on PatentBrief.

- [How the modern internal menstrual tampon was invented](https://patentbrief.org/patent/us/1964911/tampon-applicator-haas) — granted 1934
  Earle Haas's 1933 patent describes the first modern internal menstrual tampon, designed to be inserted into the vagina using a cardboard applicator.

**Full profile:** https://patentbrief.org/inventor/earle-c-haas

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