Patent DE856899C successfully refreshed from Google Patents.
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DE856899C Expired / Lapsed DE ⏱️ 0.0 years remaining

Sound guide equipped with a loudspeaker

Assignee: Individual
•
Filing: 1950-03-16
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Granted: 1952-11-24
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Expires: 1970-03-16
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Abstract

No abstract record available.

Inventors

  • 👤 Fritz Gabriel

Bibliographic Details

Application Number —
Jurisdiction DE
Data Source google_patents
Last Synchronized 2026-11-06 21:50
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2853; H04R1/2857

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