US3481249A - Milling machine for making spiral conical ...
US3481249A US3481249DA US3481249A US 3481249 A US3481249 A US 3481249A US 3481249D A US3481249D A US 3481249DA US 3481249 A US3481249 A US 3481249A Authority US United States Prior art keywords cone cam spiral carriage antenna feed Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
