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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7290374 | Vibration control apparatus using water tank located at top floor of a tall building A vibration control apparatus using a water tank, which is installed at the uppermost floor of a tall building, the water tank being formed at the inner wall surface thereof with horizontal protrusions. In order to improve a vibration attenuation rate in a horizonta... | 11/06/2007 |
| 7201865 | Method of manufacturing foam core boat collars Methods for fabricating foam cored items in which the foam core is tightly encased by an outer shell. The foam core is compressed, reducing a characteristic dimension, thereby facilitating installation and/or removal of the foam. The foam is then allowed to expand t... | 04/10/2007 |
| 5850646 | Pressure relief mattress A pressure reduction mattress construction for a liquid or gel bed having a flexible basin forming a cavity with inclines head and foot for surrounding and supporting a liquid or gel filled flotation bladder that is anchored to the head of the basin. The ... | 12/22/1998 |
| 5421043 | Tube type watermattress with immovable wave dampening inserts A watermattress includes a plurality of elongated water-filled tubes in a suitable frame, and each tube includes a wave dampening insert of foam or fiber. A base strip made of a substantially flexible material, such as vinyl, is fastened to each end of th... | 06/06/1995 |
| 5406660 | Waterbed mattress with plastic netting fill Waterbed mattress having an enclosure for holding a body of water for buoyantly supporting a person resting on the mattress, and a body of crumpled plastic netting within the enclosure for reducing wave action in the water and providing additional support... | 04/18/1995 |
| 5222262 | Waterbed mattress with baffles A waterbed mattress includes a watertight envelope having a top, a bottom, and sides, which envelope defines a cavity for water. Anti-wave material such as fiber or foam, or anti-wave structure such as hydraulic inserts, is disposed inside the watertight ... | 06/29/1993 |
| 5172438 | Waterbed mattress with equalized edge support Waterbed and mattress having a pair of elongated buoyant members are near the side edges of the mattress to provide additional support for a person resting near the edges of the bed. This additional support tends to equalize the support provided along the... | 12/22/1992 |
| 5152020 | Waterbed mattress having improved anchoring of floating inserts According to the present invention, an improved method of anchoring floating waterbed mattress inserts is provided. A vinyl tether is provided which is secured at one end thereof to the floating insert. The other end of the tether is welded to a section o... | 10/06/1992 |
| 5077848 | Wave dampened watermattress with tubes and lumbar support A tube-type watermattress has a plurality of elongated tubes disposed in a head-to-toe direction in the mattress. A wave dampening insert enclosed in each tube has a center portion which is substantially thicker than the rest of the insert to provide addi... | 01/07/1992 |
| 5075913 | Water mattress with dual denier fiber baffle A water mattress has an outer shell and a wave dampening fiber baffle positioned within the shell. The baffle includes an upper comfort layer formed of a porous mass of bound-together fibers and a lower support layer formed of a porous mass of bound-toget... | 12/31/1991 |
| 5074001 | Waterbed mattress insulation with heat transfer holes at a greater density towards foot end of mattress An improved waterbed mattress includes a bladder having a layer of insulation material extending substantially from end to end and side to side therein, which insulation material has a plurality of generally upright holes opening through the top and botto... | 12/24/1991 |
| 5050257 | Easy draining waterbed mattress and method Fiber-filled waterbed mattress and method of draining the same. A drainage manifold is positioned beneath a wave dampening fibrous insert to direct water toward a drain valve, and air is admitted into the mattress to replace water which is removed and to ... | 09/24/1991 |
| 4972534 | Flotation cover for mattresses A mattress cover for use on a conventional innerspring mattress to give the same feeling as is provided by a waterbed, including a liquid-filled flat bladder having a small height from its top wall to its bottom wall. Insulative padding is included in a c... | 11/27/1990 |
| 4934006 | Waterbed wave dampening batt and method A wave dampening batt for use inside a waterbed mattress is made by intimately mixing a multiplicity of short, non-woven fibers of a first type and a multiplicity of short, non-woven thermal bonding fibers. Raising the temperature of the mixture of fibers... | 06/19/1990 |
| 4905331 | Watermattress An improved waterbed structure including an upwardly opening frame with a horizontal watermattress supporting platform and vertical longitudinally and laterally extending upwardly projecting side and end retaining boards about the perimeter of the platfor... | 03/06/1990 |
| 4901386 | Air adjustable water mattress An air adjustable waterbed mattress which is adapted to support one or more persons on a sleeping surface. An air chamber unit is contained within a liquid-filled bladder and extends from one side of the bladder toward the other. On inflation, the air cha... | 02/20/1990 |
| 4701967 | Hydraulic unit for waterbed, and method of forming A hydraulic unit for a waterbed mattress is provided, along with a method for constructing the unit. The usual lower sheet having a plurality of chambers is covered with the usual upper sheet, and the fibrous bat is placed over the upper sheet. The assemb... | 10/27/1987 |
| 4688284 | Wave dampened waterbed A wave dampened waterbed mattress includes a bladder for containing water, a first horizontally extending baffle within the bladder having a horizontal extent corresponding generally to the horizontal extent of the top wall, and including flotation materi... | 08/25/1987 |
| 4672701 | Polypropylene fiber baffle for waterbed mattress In a waterbed mattress a novel wave dampening batt of unwoven polypropylene fibers bonded together with an ethylene acrylic acid binder so as to provide the resultant batt with a specific gravity in the range of 0.9 to 0.999. Polyester fibers may advantag... | 06/16/1987 |
| 4663789 | Hydraulic baffle for waterbed mattress A damping structure is disclosed to float freely within the envelope of a waterbed mattress. The damping structure comprises a bottom panel of flexible sheet material with a number of tubular structure extending upwardly therefrom. Each tubular structure ... | 05/12/1987 |
| 4663788 | Wave-dampening apparatus for a waterbed A wave-dampening apparatus is disclosed for use in a waterbed mattress. The apparatus comprises a layer of fibrous material which is positioned within the mattress bladder and which has a plurality of elongated float members embedded therein in a spaced-a... | 05/12/1987 |
| 4658453 | Wave-retarding waterbed mattress A wave-retarding waterbed mattress comprising an envelope of supple sheet material for containing a liquid hterein and a free floating wave motion retarding baffle within the hollow interior of the envelope. The baffle comprises a plurality of bouyant she... | 04/21/1987 |
| 4575885 | Waterbed mattress with free floating baffle A waterbed mattress has an internal horizontally-extending baffle for reducing wave-like motion of the water in the mattress. The baffle comprises at least two horizontally-extending layers secured together, a first layer denser than water and a second la... | 03/18/1986 |
| 4575886 | Fiberous wave-dampening apparatus An apparatus for dampening wave action in a waterbed is disclosed. The apparatus consists of a fibrous member bonded to a flexible foam member which is positioned inside a waterbed bladder. The coaction of the fiber and foam dampens waves generated in the... | 03/18/1986 |
| 4517691 | Motion damping system for water bed mattresses A free floating wave control unit in combination with a water bed mattress and detachably disposed interiorly therein and coextensive of the top panel of the mattress and comprised of a floatable frame carrying thick fiber batting underlying the top panel... | 05/21/1985 |
| 4496623 | Buoyant fiber product The fiber product includes a large multiplicity of fibers bound together with a binder. The binder also secures a quantity of buoyant particles, such as expanded foam beads, to the fibers. The buoyant particles render the product as a whole buoyant. The f... | 01/29/1985 |
| 4481248 | Buoyant fiber product and method of manufacturing same A buoyant fiber product and method of manufacturing same. The fiber product includes a quantity of fibers which are bound together with a binder. The binder also secures a quantity of buoyant particles, such as foam beads, to the fibers. The buoyant parti... | 11/06/1984 |
| 4479275 | Waterbed mattress with functionally nonredundant inner bladder means for wave attenuation An improved waterbed mattress with adjustable hydrostatic wave absorption comprising an outer water-inflatable bag-like enclosure provided with an inner wave-absorbing water bladder. When a user sits or lies on a conventional waterbed an undesirable wave ... | 10/30/1984 |
| 4467485 | Waterbed mattress with free floating baffle A waterbed mattress has an internal horizontally-extending baffle for reducing wave-like motion of the water in the mattress. The baffle comprises at least two horizontally-extending layers secured together, a first layer denser than water and a second la... | 08/28/1984 |
| 4462128 | Wave-reducing baffle for water beds A wave-reducing water mattress for water beds has a wave-reducing baffle comprising a flexible fibrous layer, preferably of polyester fibers, occupying a major portion of the horizontal area traversed by the water-filled mattress. The fibrous layer resist... | 07/31/1984 |
| 4399575 | Waterbed mattress with unattached baffle structure A waterbed mattress has a baffle structure comprising a horizontally extending buoyant pad. The pad is anchored to an underlying anchor sheet that is not secured to the walls of the mattress. A porous mass of bound together fibers is positioned between th... | 08/23/1983 |
| 4301560 | Waterbed mattress An improved adjustable waterbed mattress with hydrostatic wave absorption comprising a water-inflatable bag-like enclosure containing therein a non-woven or very loosely woven expanded fiber product, unbonded or fixed with a binder to the same or another ... | 11/24/1981 |
