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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 5108590 | Water dispenser Disclosed is a self service water dispensing apparatus especially adapted to be located inside a grocery store. This apparatus includes a housing which provides a rigid support structure having a base section which has integral therewith a water storage t... | 04/28/1992 |
| 5062441 | Drain valve used in aircraft Disclosed is a valve used in the water drainage system of an aircraft having a pressurized cabin. The valve includes a housing with a water inlet and outlet and in which a float is mounted by a spring. The float includes a stopper element adapted to engag... | 11/05/1991 |
| 5060562 | Rotary indexing machine Disclosed is a machine for manufacturing bakery products wherein a main drive motors powers feeding means for advancing rows of individual dough packets step-wise along an assembly line to a Ferris-wheel type conveyor including rows of cups into which ind... | 10/29/1991 |
| 5047150 | Settled solids removal mechanism There is disclosed a solids collection and removal system for a settling tank. It is particularly designed for installation in generally rectangular, in-ground settling tanks such as is commonly used for water treatment. The collection device includes a p... | 09/10/1991 |
| 5045211 | No drain acid treatment of pools There is disclosed a method for the treatment of confined bodies of water such as a swimming pool to remove scale deposits from the surfaces of the vessel containing the water. The water is acidified with a mixture of hydrochloric acid, sulfamic acid and ... | 09/03/1991 |
| 5040304 | Locating device used with electrical outlet boxes and the like Disclosed is a device for locating the open side of an electrical outlet box comprising a flat locater plate having a pair of positioning pins extending outwardly from one side of the plate and a pair of template alignment pins extending outwardly from th... | 08/20/1991 |
| 5035234 | Method for functional evaluation and exercising the back muscles of a person Disclosed is a back exerciser including a table having first and second separate, but adjacent sections aligned with each other so that the first section supports the torso of the person reclining on the table and the second section supports the lower bod... | 07/30/1991 |
| 4991317 | Inflatable sole lining for shoes and boots There is disclosed an inflatable inner sole for a shoe or boot which is formed of upper and lower plastic sheets having the shape and size of a sole and bonded together in a continuous seam about their peripheral edges thereby forming a sealed interior. A... | 02/12/1991 |
| 4991847 | Timed water release toy There is disclosed a ball having a foraminous outer shell with an inner membrane which forms an interior closure within the outer shell and with a timer and a release mechanism operative to open the inner membrane and release its contents after the time o... | 02/12/1991 |
| 4973821 | Control unit for welding apparatus having offset and tracking control features Disclosed is a control unit for welding apparatus which feeds wire in the presence of a shielding gas to a workpiece at different rates with different heat inputs in accordance with the wire feed rate. The control unit is designed so that through a single... | 11/27/1990 |
| 4932659 | Golf putter with alignment device There is disclosed a golf putter having a unique shape that improves putting performance. The putter has a more or less conventional head with a flat, ball-striking surface. The metallic shaft of the putter has a rectangular cross section and the front su... | 06/12/1990 |
| 4930632 | Hazardous liquid containment tray There is disclosed a containment tray which is formed of plastic which is molded into a tray having upright perimeter walls and a bottom wall having transverse channels in its undersurface for receiving the conventional arms of a forklift or pallet jack. ... | 06/05/1990 |
| 4908960 | Overshoe Disclosed is an overshoe including a sole section, shoe section, and ankle cover section having a flap which folds inwardly towards the inside ankle of the user. The flap is detachably secured in position by a fastener which is covered by the flap upon be... | 03/20/1990 |
| 4901382 | Mounting apparatus for wall beds A wall bed is disclosed employing a linkage assembly which moves the wall bed outwardly from a wall or cabinet in a fashion so that the head end of the bed will not be in the cavity and the level of the mattress will be at a height which approximately cor... | 02/20/1990 |
