Patent drawing - Drawing of Improvement in Projectiles for Rifled Ordnance Public domain image
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Utility Patent Drawings
Public domain photograph of the US industrial development, construction, work of U.S. government, free to use, no copyright restrictions image - Picryl description
Berühmte Patentzeichnungen aus dem National Archives, Washington DC
A very large dataset of various big guns, howitzers, mortars, columbiads, all types of canon-like things - everything besides machine guns and rockets. This collection as well as all massive collections on Picryl.com required two steps: First, we picked a set to train AI vision to recognize cannon artillery, and after that, ran all 25M+ images in our database through our image recognition network. All media in the collection is in the public domain. There is no limitation on the dataset usage - educational, scientific, or commercial.
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