Show HN: Explore ideas whose patent protection expires today
I was randomly clicking and found this one:
<a href="https:&#x2F;&#x2F;patents.google.com&#x2F;patent&#x2F;US5588162" rel="nofollow">https:&#x2F;&#x2F;patents.google.com&#x2F;patent&#x2F;US5588162</a><p>The Legal events at the bottom says it expired in 2001. Seems strange?