# Carter Wallace Inc — Patents explained on PatentBrief

Carter Wallace Inc has 1 landmark patent explained in plain English on PatentBrief.

- [How to Make Clear, Waterproof Sunscreen That Doesn't Feel Greasy](https://patentbrief.org/patent/us/4810490/tpa-tissue-plasminogen-activator) — granted 1989
  A 1989 patent for a transparent, water-resistant sunscreen formula that uses wood rosin to create a non-sticky, long-lasting protective film on the skin.

**Full profile:** https://patentbrief.org/company/carter-wallace-inc

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