| Patents for Adolph L. De Leeuw |
Patents 1 -
10
of 33
      |
| Picture | Number | Date | Patentee | Title |
| | 713,614 | Nov. 18, 1902 | A.L. De Leeuw | Tool Relief for Metal Planers |
| | 721,942 | Mar. 03, 1903 | A.L. De Leeuw | Electric Switch System |
| | 723,840 | Mar. 31, 1903 | A.L. De Leeuw | Controlling Switch System |
| | 764,115 | Jul. 05, 1904 | A.L. De Leeuw | Speed Changer |
| | 889,768 | Jun. 02, 1908 | A.L. De Leeuw | Locking Mechanism for Machine Tools |
| | 905,506 | Dec. 01, 1908 | A.L. De Leeuw | Variable Speed Mechanism |
| | 911,951 | Feb. 09, 1909 | A.L. De Leeuw | Variable Speed Mechanism |
| | 914,643 | Mar. 09, 1909 | A.L. De Leeuw | Variable Speed Mechanism |
| | 927,776 | Jul. 13, 1909 | A.L. De Leeuw | Milling Machine |
| | 943,142 | Dec. 14, 1909 | A.L. De Leeuw | Variable Speed Driving Mechanism |
