FR48678E - Improvements to magnetic compasses - Google Patents

Improvements to magnetic compasses

Info

Publication number
FR48678E
FR48678E FR48678DA FR48678E FR 48678 E FR48678 E FR 48678E FR 48678D A FR48678D A FR 48678DA FR 48678 E FR48678 E FR 48678E
Authority
FR
France
Prior art keywords
magnetic compasses
compasses
magnetic
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)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sperry Products Inc
Original Assignee
Sperry Products Inc
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 by Sperry Products Inc filed Critical Sperry Products Inc
Application granted granted Critical
Publication of FR48678E publication Critical patent/FR48678E/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)
FR48678D 1937-07-19 1937-07-19 Improvements to magnetic compasses Expired FR48678E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR48678T 1937-07-19

Publications (1)

Publication Number Publication Date
FR48678E true FR48678E (en) 1938-05-23

Family

ID=8683976

Family Applications (1)

Application Number Title Priority Date Filing Date
FR48678D Expired FR48678E (en) 1937-07-19 1937-07-19 Improvements to magnetic compasses

Country Status (1)

Country Link
FR (1) FR48678E (en)

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