Nova Patents
US2008677A

Breathing mask

Abstract

This record has no abstract on file.

Term

Term ended

Expired 23 July 1952, 74.2 years ago.

  1. Priority and filed
  2. Granted
  3. Expired
  4. Today

Every citation, both ways

Citations
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EP0085746A3Cited byEuropean Patent Office (EPO)Search report
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US2003079751A1Cited byUnited States of AmericaPre-grant
US4957106ACited byUnited States of AmericaSearch report
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