File:US3345469 Figure 4.png

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English: Cited from the Patent:
An electrostatic loudspeaker comprised of a flexible wire mesh semi-rigid electrode and a flexible electrode with dielectric foil between them entrapping one or more strata of gas between one or more layers of foil and/or the flexible electrode. The structure is flexible enough to be rolled into a cylinder and used as a lampshade. The spacing between electrodes can be specified to provde bays of diffrenet spacings, to favor specified audible frequency bands.
Deutsch: Ein elektrostatischer Lautsprecher als Lampenschirm.
Source US Paten t3345469
Author R. L. Rod
May or may not be in the public domain
 In general, the contents of United States patents are in the public domain.

In specific cases, patent applicants and holders may claim copyright in portions of those documents. In those specific cases, applicants are required to identify the portions that are protected under copyright, and are additionally required to state the following within the body of the application and patent (see 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), and MPEP § 608.01(e) & (w) and MPEP § 1512):

A portion of the disclosure of this patent document contains material which is subject to (copyright or mask work) protection. The (copyright or mask work) owner has no objection to the facsimile reproduction by any­one of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all (copyright or mask work) rights whatsoever.

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