Record

GB 0809 Ross - Ross, Col Sir Ronald (1857-1932)
- 159 - Material on Ross' inventions including ear plugs and a clinical automatic thermometer
  - 01 - Material on the invention of ear plugs by Ross

Ref No	GB 0809 Ross/159/01/28
Level	Item
Title	Copy of a letter from Ross to Charles Baker, Scientific instrument makers
Date	30/12/1909
Description	Asks for a decision on his ear plugs as his provisional patent has nearly expired
AccessStatus	Open
Language	English

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