FR685366A - Perfectionnements aux écrans d'observation - Google Patents

Perfectionnements aux écrans d'observation

Info

Publication number
FR685366A
FR685366A FR685366DA FR685366A FR 685366 A FR685366 A FR 685366A FR 685366D A FR685366D A FR 685366DA FR 685366 A FR685366 A FR 685366A
Authority
FR
France
Prior art keywords
observation screens
screens
observation
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
English (en)
Inventor
Franklin Milton Warden
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 FR685366A publication Critical patent/FR685366A/fr
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
    • A61F9/06—Masks, shields or hoods for welders
    • A61F9/064—Masks, shields or hoods for welders with two windows, one for viewing and one for use during the welding process

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
FR685366D 1929-11-22 1929-11-22 Perfectionnements aux écrans d'observation Expired FR685366A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR685366T 1929-11-22

Publications (1)

Publication Number Publication Date
FR685366A true FR685366A (fr) 1930-07-09

Family

ID=9024935

Family Applications (1)

Application Number Title Priority Date Filing Date
FR685366D Expired FR685366A (fr) 1929-11-22 1929-11-22 Perfectionnements aux écrans d'observation

Country Status (1)

Country Link
FR (1) FR685366A (fr)

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