Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6543782 | Non-bursting ferrofluid seal | Ronald E. Rosensweig, Kuldip Raj | 2003-04-08 |
| 5806856 | On-site fillable liquid magnetic seal | William B. Mraz | 1998-09-15 |
| 5593164 | Ferrofluidic seal centering ring | William B. Mraz, Paul E. McMahan, Larry A. Hufford, David T. Mooney, Robert C. Watkins | 1997-01-14 |
| 5560620 | On-site fillable ferrofluidic seal | William B. Mraz | 1996-10-01 |
| 5474302 | On-site fillable ferrofluidic seal | William B. Mraz | 1995-12-12 |
| 5340122 | Differentially-pumped ferrofluidic seal | James C. Toboni | 1994-08-23 |
| 5227601 | Adjustable welding torch mounting | — | 1993-07-13 |
| 4817964 | Ferrofluid exclusion seal and method of assembly | — | 1989-04-04 |
| 4774462 | Automatic test system | — | 1988-09-27 |
| 4749943 | Automatic test system | — | 1988-06-07 |
| 4444398 | Self-activating ferrofluid seal apparatus and method | Philip Stahl | 1984-04-24 |
| 4386649 | Programmable thermostatic control device | Randal C. Hines | 1983-06-07 |
| 4282777 | Pancake planetary drive | Henry Ryffel | 1981-08-11 |
| 4246463 | Method and apparatus for arc welding of metal plates from one side only | Robert C. Shutt, Victor Matthews | 1981-01-20 |