Image: US Patent 2424267 Figs 1a, 1b, 1c
Description: figure 1a, 1b and 1c from US patent 2424267, Philip S. Carter, "High frequency resonator and circuits therefor", granted 1947-07-22 , assigned to Radio Corporation of America
Title: US Patent 2424267 Figs 1a, 1b, 1c
Credit: From patent document.
Author: Philip S. Carter
Permission: The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted.See [1], 37 CFR 1.7(d), 37 CFR 1.84(s) The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as Template:PD-ineligible.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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