| Patents for Edwin S. Matthews |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 450,965 | Apr. 21, 1891 | E.S. Matthews | Elevator-valve controller |
| | 453,980 | Jun. 09, 1891 | E.S. Matthews | Hydraulic valve-gear |
| | 455,536 | Jul. 07, 1891 | E.S. Matthews | Elevator |
| | 469,655 | Feb. 23, 1892 | E.S. Matthews | Elevator-controller |
| | 472,930 | Apr. 12, 1892 | E.S. Matthews | Controller for elevators |
| | 476,289 | Jun. 07, 1892 | E.S. Matthews | Safety device for elevators |
| | 481,580 | Aug. 30, 1892 | E.S. Matthews | Elevator-controlling mechanism |
| | 503,975 | Aug. 29, 1893 | E.S. Matthews | Hydraulic valve-gear |
| | 519,639 | May 08, 1894 | E.S. Matthews | Hydraulic valve |
