| Patents for John T. Hepburn, Ltd. |
Patents 16 -
22
of 22
      |
| Number | Date | Patentee | Title | Type |
| 4,828,474 | May 09, 1989 | R. Ballantyne | Hydraulic cylinder device for platen spacing indication and control | hydraulic metalworking presses |
| 4,836,125 | Jun. 06, 1989 | R. Ballantyne, M. Murray | Anchoring system for floating structure | |
| 4,841,898 | Jun. 27, 1989 | R. Ballantyne | Anchoring system for floating structure | |
| 4,862,821 | Sep. 05, 1989 | R. Ballantyne | Mechanism for tensioning a moving chain | boats and ships |
| 5,088,400 | Feb. 18, 1992 | A. Ferguson | Adjusting press platen clearance | hydraulic metalworking presses |
| 5,156,782 | Oct. 20, 1992 | R. Ballantyne | Maintaining press platens in parallel relationship | hydraulic metalworking presses |
| 5,237,916 | Aug. 24, 1993 | L. Malashenko | Regenerative hydraulic cylinders with internal flow paths | hydraulic metalworking presses |
