FR822232A - Improvements to indicating devices - Google Patents

Improvements to indicating devices

Info

Publication number
FR822232A
FR822232A FR822232DA FR822232A FR 822232 A FR822232 A FR 822232A FR 822232D A FR822232D A FR 822232DA FR 822232 A FR822232 A FR 822232A
Authority
FR
France
Prior art keywords
indicating devices
indicating
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
Paul Kollsman
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 FR822232A publication Critical patent/FR822232A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR822232D 1936-05-25 1937-05-25 Improvements to indicating devices Expired FR822232A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US822232XA 1936-05-25 1936-05-25

Publications (1)

Publication Number Publication Date
FR822232A true FR822232A (en) 1937-12-23

Family

ID=22169832

Family Applications (1)

Application Number Title Priority Date Filing Date
FR822232D Expired FR822232A (en) 1936-05-25 1937-05-25 Improvements to indicating devices

Country Status (1)

Country Link
FR (1) FR822232A (en)

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