File:US Patent 661,619 - Magnetic recorder.jpg

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Original file ‎(1,641 × 2,648 pixels, file size: 1.27 MB, MIME type: image/jpeg)

Captions

Captions

This is a wire recorder diagram invented to record and playback sound

Summary

[edit]
Description Figure 1 of United States Patent 661,619 by Danish inventor Valdemar Poulsen - the first magnetic recorder.
Date Issued November 13, 1900.
Source United States Patent Office.
Author United States Patent Office, Valdemar Poulsen inventor.
Permission
(Reusing this file)		 Public domain - original work of the US Federal Government. All text and figures in US Patents are in the public domain.

Licensing

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Public domain
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

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Date/TimeThumbnailDimensionsUserComment
current22:30, 20 March 2007Thumbnail for version as of 22:30, 20 March 20071,641 × 2,648 (1.27 MB)Daderot (talk | contribs){{Information |Description=Figure 1 of United States Patent 661,619 by Danish inventor Valdemar Poulsen - the first magnetic recorder. |Source=United States Patent Office. |Date=Issued November 13, 1900. |Author=United States Patent Office, Valdemar Pouls

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