| 5232136 |
Holder for scrapers |
— |
1993-08-03 |
| 5144713 |
Hand-operated wiping instrument for floors |
— |
1992-09-08 |
| 5083338 |
Cleaning device with quick connect cleaning element |
— |
1992-01-28 |
| 5076478 |
Water holding device for use by window washers |
— |
1991-12-31 |
| 4922577 |
Extensible handle bar |
— |
1990-05-08 |
| 4919019 |
Device for the removal or installation of fluorescent tubes of the single-pin type |
Michael Vorobyov |
1990-04-24 |
| 4858267 |
Apparatus for wet cleaning in particular window panes |
— |
1989-08-22 |
| 4847938 |
Cleaning apparatus, particularly for cleaning window panes |
— |
1989-07-18 |
| 4791835 |
Device for installing or removing fluorescent tubes from lighting fixtures |
Michael Vorobyov |
1988-12-20 |
| 4602532 |
Apparatus for applying and releasing wood screws, provided with suspension hooks, and also magnetic holders, to and from comparatively high structural parts |
— |
1986-07-29 |
| 4461057 |
Handle bar formed as telescopic tube |
— |
1984-07-24 |
| 4218085 |
Device for screwing in and out electrical lamps |
— |
1980-08-19 |