Virtual Patent Marking

The Hedgehog featherboard and push block are protected by patents in the United States. This web page is provided in compliance with the virtual patent marking provisions of the America Invents Act.

  • U.S. Patent D828,418
  • U.S. Patent 10,377,003
  • U.S. Patent D949,649


The Hedgehog logo is a US registered trademark: Serial Number 87095735.

Hedgehog featherboard logo trademark