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Thomas Watson, chairman of IBM ; 1943
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| Number | Title | Issue Date |
| 5214868 | Apparatus for laying an underground member An apparatus is disclosed for laying an underground member such as a service wire, tubing or the like. The apparatus includes a frame having a plurality of wheels with a rotatable cutting blade and a fixed cutting blade mounted to the frame for extending ... | 06/01/1993 |
| 4042037 | Lawn edging device The present invention resides in a floor cleaning aid or lawn edging device comprising a shank having a handle portion at one end thereof, a blade member depending from another end of said shank remote from said handle, means projecting from said blade me... | 08/16/1977 |