Drawing of Improvement in Skates - NARA - 595008.jpg
en
Drawing of Improvement in Skates NARA 595008, US National Archives series: Utility Patent Drawings, Images from the National Archives and Records Administration, US National Archives location: other, Drawing of Improvement in Skates
commons
ja
スケート NARA 595008、米国国立公文書館シリーズ:実用特許図面、米国国立公文書館所蔵画像:他、スケートにおける改善図面
commons_translated
improvable improvement augmentation