Quotables
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 6854932 | Cable pulling apparatus A cable pulling apparatus for pulling a work load attached to a cable, including at least one cable-pulling device for engaging the cable. The cable-pulling device or devices each includes at least one cable-pulling member fitted with a cable-gripping element for pu... | 02/15/2005 |
| 6655874 | Method and apparatus for slitting flexible pipe in an underground bore A method of slitting a flexible conduit in an underground bore, the conduit having entry and exit ends thereof exposed for access, includes: (1) fitting a retainer to flexible underground conduit adjacent to the entry end thereof, the retainer securing th... | 12/02/2003 |
| 5871204 | Hand tool with adjustable head A hand tool with a pivotal head portion includes a first manually rotatable collar which causes movement of a second slidable collar along a handle of the tool to secure the head portion at a desired angle with respect to the handle. Serrations on the too... | 02/16/1999 |
| 4822006 | Pole pulling apparatus and method An apparatus for removal of embedded utility-type poles which removes the poles quickly and efficiently from their embedded position without damage to the pole or surrounding structures. The apparatus includes at least 2 piston/cylinder members equally sp... | 04/18/1989 |
| 4676312 | Well casing grip assurance system A casing grip assurance interlock system connected with the elevator and the spider of a well casing installation apparatus including positioning valves respectively actuated by the elevator and the spider to permit actuating fluid pressure to be admitted... | 06/30/1987 |
| 4475604 | Mobile machine for subterranean installation of piping and the like A ground supported mobile machine appropriate for subterranean installation of piping and the like has a tractor vehicle carrying a trencher driven from the tractor power source, a power operated backfill blade operated from such source to facilitate tran... | 10/09/1984 |
