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| Number | Title | Issue Date |
| 4946079 | Vented and valved pouring spout A pouring spout for attachment to liquid containers having superimposed passages therein, one for air to enter the container and the other for fluid to exit therefrom. a thumb-actuated ball valve seated in fluid-tight relation within a spherically-shaped ... | 08/07/1990 |
| 4939458 | Method and apparatus for quantifying superconductivity The invention relates to a novel apparatus for detecting as well as quantifying superconductivity characterized by a rigid-stemmed pendulum used to support the superconductive sample for free-swinging movement about a low-friction fulcrum in a magnetic fi... | 07/03/1990 |
| 4914887 | Method and apparatus for anchoring backfilled wall structures A subassembly for use with a wall panel to retain a backfilled enbankment or the like is disclosed which subassembly comprises a pair of pillar-like concrete anchor members having vertical keyslots formed therein which receive and lock onto the enlarged e... | 04/10/1990 |
| 4888880 | Electrician's level An electrician's tool is disclosed which comprises a combination template and spirit level. A pair of locating pins stored in the housing carrying at least one spirit level are removable and relocatable in a pair of pin-receiving openings which are spaced... | 12/26/1989 |
| 4887833 | Touring ski binding The disclosure relates to a cross country ski binding having a triple-leaved hinge interconnecting a fixed toeplate and a heelplate detachably connected to the boot heel characterized in that as the boot is bent at the ball of the foot and lifted off the ... | 12/19/1989 |
| 4879828 | Constant force spring for cartridge magazines Our invention relates to an improved anti-curl feature for constant-force springs to be used in lifting a stack of shells by means of a follower in a multiple cartridge magazine for firearms thereby lessening the transverse curl in at least the uncoiled p... | 11/14/1989 |
| 4874046 | Groove cutter for concrete bores The invention relates to improvements in rotary groove-cutting tools of the type having a rotatable center shaft and two or more generally arcuate flyweight subassemblies mounted for rotational movement with the center shaft, each such subassembly when th... | 10/17/1989 |
