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| Number | Title | Issue Date |
| 6296136 | Obturator with improved retention in a metal sheet aperture An obturator for an aperture (8) produced in a metal sheet (9) has a central dome (1), a peripheral lip (3) and an annular part (3) extending between the dome (1) and the lip (2). The annular part (3) has a shoulder (4). The dome (1) is adapted to deform ... | 10/02/2001 |
| 3983598 | Self-boring bushing device A self-boring bushing device adapted to provide passage through a structure, such as a wall, wherein the device is so constructed as to both thread and bore itself therein upon rotation thereof, thus providing communication between both sides of the wall,... | 10/05/1976 |
