# L Smith — Patents explained on PatentBrief

L Smith has 1 landmark patent explained in plain English on PatentBrief.

- [How to Calculate Distance to a Radio Signal Using Two Antennas](https://patentbrief.org/patent/us/3789410/gps-timation-navigation) — granted 1974
  A 1970s Navy system that calculates the distance to a radio-emitting target by measuring the tiny time and phase differences between signals arriving at two separate antennas.

**Full profile:** https://patentbrief.org/inventor/l-smith

---

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