PATENTS FOR INVENTIONS, ABRIDGEMENT OF SPECIFICATIONS 340001-360000, 420000-500000,500000-600000, 600000-700000 700000-720000. EXCAVATING AND MINING. FIRES,FIGHTING. LIFESAVING, SUBAQUEOUS BUILDING AND WARFARE.
(Used) London: His Majesty's Stationery Office, 1932,36,3738, 39,56,55,54,53,52,50. Hard Cover & softcover. 11books, illus, one Hardbound, one with no covers the rest are from fair to very good. Fair to Very Good. Item #12866