US1281001A - Grinding and polishing machine. - Google Patents
US1281001A US9249616A US9249616A US1281001A US 1281001 A US1281001 A US 1281001A US 9249616 A US9249616 A US 9249616A US 9249616 A US9249616 A US 9249616A US 1281001 A US1281001 A US 1281001A Authority US United States Prior art keywords head grinding carriage machine polishing Prior art date Legal status (The legal status is an assumption and is …