Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4735291 | Hydraulic jack assembly for a hydraulic elevator | — | 1988-04-05 |
| 4685537 | Elevator system which utilizes both rigid and resilient mounting arrangments for door operator | — | 1987-08-11 |
| 4570781 | Escalator | — | 1986-02-18 |
| 4397096 | Method of and apparatus for positioning the drive units of a plural drive escalator | Joseph K. Kraft | 1983-08-09 |
| 4361209 | Elevator system | Leigh F. Jackson | 1982-11-30 |
| 4361208 | Modular elevator car | Leigh F. Jackson | 1982-11-30 |
| 4357995 | Hydraulic system including oil replenishment for multi-stage hydraulic jack | — | 1982-11-09 |
| 4356895 | Elevator system | Niles J. Martin, John E. Pace, Robert A. Sette, Charles E. Randall, Leigh F. Jackson +1 more | 1982-11-02 |
| 4316316 | Shipping assembly for a hydraulic jack | — | 1982-02-23 |
| 4219226 | Cylinder joint | — | 1980-08-26 |