"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7089679 | Measuring apparatus and method therefor An apparatus for measuring linear distances comprising a wheel to be rolled along a surface to be measured, wherein the wheel comprises a plurality of incremental line markers to facilitate measurement of selected intervals, and wherein the wheel is maintained withi... | 08/15/2006 |
| 7047659 | Multi-task promotional apparatus A promotional apparatus includes a housing having first and second openings and an elongated slot formed therein. A first measuring tape is disposed within the housing, and is retractably extendable from the housing via the first opening. A second measuring tape is ... | 05/23/2006 |
| 7013570 | Stud finder A stud finder for a light generating device, having a surface and a connection structure on the surface to removably mount either a light generating device or a leveling device thereto. ... | 03/21/2006 |
| 7007534 | Methods for production of continuous stretches of circular cylindrical members, tools, use of a tool, a length of pipe and pipe parts The present invention regards methods of projecting, producing and bending continuous stretches of circular cylindrical bodies, such as stretches of piping, handrails and rails for stair lifts. The invention also regards a tool for use with the method, application o... | 03/07/2006 |
| 6898861 | String line tool and sheaths therefor A pointed tool and sheath combination allow for use of the tool as a string line anchor and/or as a plumb bob and provide safe storage of the tool when not in use. The preferred tool is comprised of a dart-like body having a longitudinal axial bore, and a sharpened ... | 05/31/2005 |
| 6622393 | Combined string line anchor and plumb bob This invention is a tool combining the function of a string line or chalk line anchor and a plumb bob. This combined tool is comprised of a dart-like body having a longitudinal axial bore. A sharpened spike is clamped within the longitudinal bore. The amo... | 09/23/2003 |
| 5720113 | Apparatus designed for use as both a string line anchoring device and as a plumb bob A tool is disclosed which incorporates both a stick-pin peg and an eyelet-shaped hook, either of which may be used to anchor a chalk line. The tool can also double as a plumb bob. The tool has a peg-shaped body with a longitudinal axis. The body has a tap... | 02/24/1998 |
| 5459933 | Level position measuring method and device A level position measuring method including providing a hose having a first end and a second end; filling the hose, at least partially, with a liquid so as to form a water head; leaving the first end of the hose open to atmospheric pressure; closing the s... | 10/24/1995 |
| 5414942 | Apparatus and method for measuring baluster lengths and replicAting baluster layout from a base surface to a handrail A measuring tool for measuring and marking a generally straight distance between opposing boundaries comprises an elongate shaft which is selectively extendable to span a range of distances. A measuring scale is formed in the shaft for indicating the leng... | 05/16/1995 |
| 5367782 | Level marking method and level marking apparatus A level marking method including providing a hose having a first end and a second end; filling the hose, at least partially, with a liquid so as to form a water head; leaving the first end of the hose open to atmospheric pressure; closing the second end o... | 11/29/1994 |
| 5157843 | High accuracy self-setting plumb bob with slide hammer A plumb bob capable of marking either soft or hard surfaces is disclosed. A chalk reservoir can be attached to the bob for marking hard surfaces. Removing the chalk reservoir enables the user to insert a metal stake or headless nail into the bob, where it... | 10/27/1992 |
| 5092057 | Locating and leveling tool A tool for locating a pair of points on a horizontal line at a desired distance from a reference point is disclosed including an elongated body carrying a pair of slidable selectively positonable spaced apart locator members and a scale for indicating the... | 03/03/1992 |
| 4958441 | Center punch block device A center punch block device is set forth wherein a main body includes a level pivotally mounted thereto within a slot transversely oriented within the block and transversely arranged to an elongate "V" slot formed within a lowermost surface of the body to... | 09/25/1990 |
| 4944094 | Picture frame leveling tool A picture frame leveling tool includes an elongate, generally "L" shaped body formed with a horizontal and vertical defined leg defining a notch within the legs to accept a picture frame therewithin. Upper and lower visual level indicators enable alignmen... | 07/31/1990 |
| 4438538 | Combination tool for carpentry The tool incorporates a housing for opposed tape and chalkline reels. The housing has sufficient height to act as, and in conjunction with, an attached abutment, to make the tool useable as a cutting guide square. The abutment surface has the triple funct... | 03/27/1984 |
| 4189844 | Chalk line protracting tool A chalk line protracting tool comprising a housing defining a compartment for holding chalk and line; a chalk line guide; and a level. A chalk line is fed from a manually operated reel, through an aperture between the compartment and the exterior of the h... | 02/26/1980 |
| 4188729 | Scribing protractor A scribing protractor comprises a dial calibrated in selected units of angular measurement and plumb needle means pivotally mounted overlying the dial for determining the angle with reference to the vertical of a surface to be measured. Scribing means are... | 02/19/1980 |