CA419212A - Electric seismograph device - Google Patents

Electric seismograph device

Info

Publication number
CA419212A
CA419212A CA419212A CA419212DA CA419212A CA 419212 A CA419212 A CA 419212A CA 419212 A CA419212 A CA 419212A CA 419212D A CA419212D A CA 419212DA CA 419212 A CA419212 A CA 419212A
Authority
CA
Canada
Prior art keywords
electric
seismograph device
electric seismograph
seismograph
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
CA419212A
Other languages
French (fr)
Inventor
Preston Minton John
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.)
ExxonMobil Oil Corp
Original Assignee
Socony Vacuum Oil Co Inc
Publication date
Application granted granted Critical
Publication of CA419212A publication Critical patent/CA419212A/en
Expired legal-status Critical Current

Links

CA419212A Electric seismograph device Expired CA419212A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA419212T

Publications (1)

Publication Number Publication Date
CA419212A true CA419212A (en) 1944-03-21

Family

ID=35528490

Family Applications (1)

Application Number Title Priority Date Filing Date
CA419212A Expired CA419212A (en) Electric seismograph device

Country Status (1)

Country Link
CA (1) CA419212A (en)

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