| Patents for Edwin S. Matthews |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 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 | |
