Fichier:Patent US1022384A on Georg Bahr's Normograph.png

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Description

Description	English: Georg Bahr's Normograph, one of the first lettering guides
Date	1912
Source	https://worldwide.espacenet.com/patent/search/family/003090681/publication/US1022384A
Auteur	Georg Bahr

Conditions d’utilisation

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 37 CFR 1.71(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 {{PD-ineligible}}.

Historique du fichier

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	Date et heure	Dimensions	Utilisateur	Commentaire
actuel	12 octobre 2023 à 09:09	1 609 × 2 613 (370 kio)	Phreneticc	The image is aligned, additionally cropped and compressed losslessly. Explanation of increased weight of the file: at alignment there are distortions and to avoid them was used smoothing, after this operation appeared 64 shades of gray (in the original was black and white).
	13 juillet 2020 à 20:07	1 593 × 2 645 (65 kio)	Ain92	Cropped 31 % horizontally, 22 % vertically using CropTool with precise mode.
	13 juillet 2020 à 20:01	2 320 × 3 408 (71 kio)	Ain92	Uploaded a work by Georg Bahr from https://worldwide.espacenet.com/patent/search/family/003090681/publication/US1022384A with UploadWizard