DE744974C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for producing recordings of optical, acoustic or electrical processes by means of electrical polarization
Assignee: ULRICH W DOERING
•
Filing: 1930-02-18
•
Granted: 1944-02-21
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Expires: 1950-02-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-29 19:15
CPC Classifications
G; G11; G11B; G11B9/00; G11B11/00; G11B11/08
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References Cited (Backward Citations)
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