• Creator
  • Department of Commerce. Patent and Trademark Office. 1975-
  • Created Date
  • 1877-01-01/1877-12-31
  • Description
  • This file includes drawings, specifications, petitions, and correspondence for Ear-Mufflers, also known as earmuffs, invented by Chester Greenwood.
  • Format
  • Paper
  • Rights
  • Unrestricted