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Certificate by the Acoustical Society of America 1. Oktober 1956

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Post Date: January 17, 2023

Last Modified: January 17, 2023

Certificate by the Acoustical Society of America 1. Oktober 1956

Text Type:

Other

Author:

Acoustical Society of America

Part of Collection:

Material from the private estate of Anton Marian Springer

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Post Date: January 17, 2023

Last Modified: January 17, 2023

United States of America Patent Nr. 2,719,879

15_Brief [Letter] Ir. G.L. Tegelberg aan [to] Ir. Wouter Cool, Algemeen secretaris Koninklijk Instituut van Ingenieurs [General secretary Royal Institute for Engineers], 17.12.1934

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