Patents per Year
Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6164108 | Hydro compression tube forming die apparatus and method for making the same | James Holbrook Brown | 2000-12-26 | |
| 6006567 | Apparatus and method for hydroforming | James Holbrook Brown | 1999-12-28 | |
| 5890387 | Apparatus and method for forming and hydropiercing a tubular frame member | Ralph E. Roper, Douglas W. Tyger | 1999-04-06 | |
| 5533372 | Controlled material flow hydroforming | Ralph E. Roper | 1996-07-09 | |
| 5481892 | Apparatus and method for forming a tubular member | Ralph E. Roper, Douglas W. Tyger, Donald F. Lowen | 1996-01-09 | |
| 5372027 | Controlled material flow hydroforming | Ralph E. Roper | 1994-12-13 | $2,842,000 |
| 5353618 | Apparatus and method for forming a tubular frame member | Ralph E. Roper, Douglas W. Tyger | 1994-10-11 | $6,052,000 |