FR817369A - Improvements to filtering devices - Google Patents

Improvements to filtering devices

Info

Publication number
FR817369A
FR817369A FR817369DA FR817369A FR 817369 A FR817369 A FR 817369A FR 817369D A FR817369D A FR 817369DA FR 817369 A FR817369 A FR 817369A
Authority
FR
France
Prior art keywords
filtering devices
filtering
devices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Louis Jean-Baptiste Augu Colas
Jacques Rene Marie Colas
Andre Paul Joseph Colas
Alfa Societe L
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR817369A publication Critical patent/FR817369A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
FR817369D 1936-02-04 1937-02-04 Improvements to filtering devices Expired FR817369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS817369X 1936-02-04

Publications (1)

Publication Number Publication Date
FR817369A true FR817369A (en) 1937-09-01

Family

ID=5455777

Family Applications (1)

Application Number Title Priority Date Filing Date
FR817369D Expired FR817369A (en) 1936-02-04 1937-02-04 Improvements to filtering devices

Country Status (1)

Country Link
FR (1) FR817369A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936855A (en) * 1957-10-23 1960-05-17 Gen Motors Corp Pleated filter and mechanism for forming same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936855A (en) * 1957-10-23 1960-05-17 Gen Motors Corp Pleated filter and mechanism for forming same

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