Issued Patents All Time
Showing 26–50 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838065 | Corrugated fin forming apparatus | — | 1989-06-13 |
| 4774865 | Die stamping system | — | 1988-10-04 |
| 4753096 | Apparatus for controlling height of corrugations formed in a continuous length of strip stock | — | 1988-06-28 |
| 4742997 | Gas spring with separate charging and pressure relief valves | — | 1988-05-10 |
| 4741192 | Rolling metal ribbon stock into convoluted fin strip for use in heat exchangers | — | 1988-05-03 |
| 4741518 | Self contained gas spring interchangeable with coil spring | — | 1988-05-03 |
| 4735303 | Transfer apparatus | — | 1988-04-05 |
| 4665733 | Die clamp | — | 1987-05-19 |
| 4628796 | Nitrogen die cylinder | — | 1986-12-16 |
| 4602497 | Die clamping arrangement | — | 1986-07-29 |
| 4595135 | Method and apparatus for forming heat exchanger tubes | — | 1986-06-17 |
| 4590788 | Die clamp | — | 1986-05-27 |
| 4583722 | Nitrogen die cylinder | — | 1986-04-22 |
| 4572489 | Nitrogen die cylinder | — | 1986-02-25 |
| 4558784 | Corrugated strip tray | — | 1985-12-17 |
| 4558620 | Punch retainer | — | 1985-12-17 |
| 4529181 | Fluid die spring | — | 1985-07-16 |
| 4528838 | Nitrogen die cylinder | — | 1985-07-16 |
| 4507948 | Method and apparatus for cutting corrugated strip | — | 1985-04-02 |
| 4462290 | Tube cut-off machine | — | 1984-07-31 |
| 4377100 | Punch retainer | — | 1983-03-22 |
| 4343228 | Hydraulic cylinder arrangement | — | 1982-08-10 |
| 4342448 | Gas-operated cylinder | — | 1982-08-03 |
| 4339976 | Punch retainer | — | 1982-07-20 |
| 4332179 | Combined punch retainer and fluid-actuated stripper | — | 1982-06-01 |