FR540235A - Improvements in the manufacture of watch glasses - Google Patents

Improvements in the manufacture of watch glasses

Info

Publication number
FR540235A
FR540235A FR540235DA FR540235A FR 540235 A FR540235 A FR 540235A FR 540235D A FR540235D A FR 540235DA FR 540235 A FR540235 A FR 540235A
Authority
FR
France
Prior art keywords
manufacture
watch glasses
glasses
watch
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 E F Wachter
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 FR540235A publication Critical patent/FR540235A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/002—Watch crystals; Fastening or sealing of crystals; Clock glasses made of glass

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR540235D 1915-12-14 1921-09-02 Improvements in the manufacture of watch glasses Expired FR540235A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US540235XA 1915-12-14 1915-12-14

Publications (1)

Publication Number Publication Date
FR540235A true FR540235A (en) 1922-07-07

Family

ID=21988280

Family Applications (1)

Application Number Title Priority Date Filing Date
FR540235D Expired FR540235A (en) 1915-12-14 1921-09-02 Improvements in the manufacture of watch glasses

Country Status (1)

Country Link
FR (1) FR540235A (en)

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