In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7255930 | Cap nut for envelopment casting, casting including the cap nut and method of enveloping the cap nut in casting A cap nut to be enveloped in a casting made of casting material includes a substantially cylindrical body. The body has a first end and a second end adjacent to a top end surface of the body. The body has a hole and an outer peripheral surface to be enveloped in the... | 08/14/2007 |
| 7134841 | Device for optimizing and adjustment of steam balance hole area A hole diameter adjustment device for changing an existing diameter of a hole formed in a component to a smaller desired diameter includes an outer sleeve adapted for insertion within the existing hole, the first outer sleeve having an inner bore including a first t... | 11/14/2006 |
| 7059022 | Spacer for attaching a dash silencer A spacer (10) to be inserted into a dash silencer comprises a cylindrical hollow body (12), a first flange (13) extending radially outward from one of the ends of the body, a second flange (a contact flange) (14) extending radially outwar... | 06/13/2006 |
| 6588997 | Bolt fixing assembly A bolt fixing assembly comprises a bolt body, a resilient sleeve, and a pressing member. The bolt body includes a head and a shank. The resilient sleeve includes plural toothed plates integrally formed on an outer periphery thereof. Each resilient toothed... | 07/08/2003 |
| 6579049 | Expansion anchor An expansion anchor to be set in a bore of a constructional component and including an anchor member (1) having, at its end facing in a setting direction, an expansion region (5), a guide region (6) remote from the setting direction end of the anchor memb... | 06/17/2003 |
| 6406236 | Panel fastener and method of manufacture thereof A fastener for connecting a first panel to a second panel comprises a head and a shaft, the shaft including a plurality of spring legs, each connected at one end to the head and flexing inward and outward relative to the one end. The shaft is dimensioned ... | 06/18/2002 |
| 5634750 | Expansible anchor An expansible anchor for anchoring in a hole drilled in a component has a shank having a rear end provided with a structure for fixing an article and a front end provided with at least two portions of reduced cross-section with adjoining expander cones, e... | 06/03/1997 |
| 5419664 | Expansible anchor and method of making same The expansible anchor consists of a shank having a threaded portion for fixing an article at its rear end and a reduced cross-sectioned portion with an adjoining expander cone at its front end, and, positioned over the reduced cross-sectioned portion, an ... | 05/30/1995 |
| 5314278 | Expansible anchor An expansible anchor for anchoring of an article to a component includes a shank having a portion of reduced cross-section at a front end, elements for fixing the article at a rear end, an adjoining expander cone at a rear end of the shank, and an expansi... | 05/24/1994 |
| 4925351 | Push-in fastener clip A fastener clip for positioning in a preformed aperture in a workpiece to receive a threaded fastener comprises a planar head having opposed faces with a threaded opening extending between the faces and a pair of resilient legs joined to opposite ends of ... | 05/15/1990 |
| 4854793 | Cone expansion wall plug A cone expansion wall plug is provided comprising a threaded rod, an expansible socket, an expansion cone, an intermediate ring and a spacer between the head of the rod and said intermediate ring. During expansion and anchorage of the socket by the cone, ... | 08/08/1989 |
| 4696423 | High capacity shear fastener A hollow sheet metal steel fastener for joining wood and/or wood product assemblies subjected to high shear and bending stress loadings. The fastener comprises an elongated, equilateral triangular tubular shaft with continuous stiffening ribs along the ce... | 09/29/1987 |
| 4688977 | Stud anchor An anchor having a shank, a reduced neck portion on the inner end and a tapering portion, and engagement means on the outer end and having a one-piece wedging collar arranged around the reduced neck portion, and having an overlapping portion extending par... | 08/25/1987 |
| 4610589 | Screw anchoring bushing for use in semihard materials A screw anchoring plug or bushing for use in predrilled mounting holes in elements of semihard materials such as chipboard, consisting of a sleeve made as a rolled up piece of metal sheet material provided with a number of slightly projecting barb-like to... | 09/09/1986 |
| 4596503 | Expansion dowel assembly with pivotally displaceable tongues An expansion dowel assembly consists of an axially extending sleeve and a spreading element. Tongues are pivotally displaceably connected to the sleeve and are located one after the other along the axial direction of the sleeve. The tongues are split in t... | 06/24/1986 |
| 4445812 | Bolt anchor especially for use in hard materials An anchor which is internally threaded for securing a bolt within a ledged hole in a hard material. The upper portion of the anchor has longitudinal slits dividing the top of the anchor into circumferentially spaced segments having a shape such that the s... | 05/01/1984 |
| 4430033 | Sheet metal insert for foam plastic A one-piece sheet metal insert for use in anchorage and fastening applications. The insert is designed to provide sufficient resistance to axial pull-out loading when utilized in relatively soft material workpieces such as structural foam plastic. The ins... | 02/07/1984 |
| 4408938 | Expansion sleeve An expansion sleeve for attaching objects to a relatively thin panel comprises a hollow headed bolt threaded externally for its full length and threaded internally at an end portion remote from the head. The unthreaded internal portion of the bolt has an ... | 10/11/1983 |
| 4395174 | Self-penetrating fastener for fastening roofing panels to metal beams A fastener for anchoring a sheet-metal roofing panel to the top horizontal web of a roof-supporting sheet-metal beam, comprises a headed shank having an enlarged tip end constructed to penetrate said roofing panel and the underlying web of the panel's sup... | 07/26/1983 |
| 4354782 | Drive-in expansion fastener An expansion fastener, especially for walls formed of plaster or drywall, in which a metallic sleeve-like member having spreadable sides is provided with a point at one end and an outwardly extending flange at the other. The fastener can be driven into th... | 10/19/1982 |
| 4312612 | Screw fixing device A device for fixing members to panels, or joining panels, which has a body moulded from a resilient plastic, comprising a head part and a tail part joined by strip-like connectors which distort when the tail part is pulled towards the head part, and inclu... | 01/26/1982 |
| 4085337 | Electric drill multi-functional apparatus An electric drill is disclosed having a tool housing, and a power shaft within the housing journaled for rotation. The tool can perform several different functions together or alternatively and includes a jaw closing function, a drilling function, a hamme... | 04/18/1978 |
| 3991534 | Cladding elements Cladding elements, such as tiles, plaques, wall panels, wall paper, vinyl covered cloth and the like are attached to or mounted on structural elements such as lath, sheet rock, and the like, by a method which includes providing cladding and structural ele... | 11/16/1976 |