US1577478A - Cylinder-grinding attachment - Google Patents
US1577478A US618021A US61802123A US1577478A US 1577478 A US1577478 A US 1577478A US 618021 A US618021 A US 618021A US 61802123 A US61802123 A US 61802123A US 1577478 A US1577478 A US 1577478A Authority US United States Prior art keywords grinding arm spindle main auxiliary Prior art date Legal status (The legal status is an assumption and is not a legal …