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| Number | Title | Issue Date |
| 7266899 | Speed level The present invention provides a combination tool for use by an individual workman, without resorting to assistance by another workman, for laying out horizontal and plumb lines in a confined space, such as that found in a shower stall, bathtub enclosure, or firepla... | 09/11/2007 |
| 7159328 | Measurement gauge incorporating a level Apparatus 10 discloses a handle 32 for manipulating the device and an extending rule portion 18 having a series of markings or measurements 26 embossed along its edge serving as a base of spacing measurement for a pivotally mounted swing ... | 01/09/2007 |
| 7114264 | Length adjustable rafter square A rafter square is provided with a triangular base plate, having a flanged base edge portion, a side edge portion, and a hypotenuse edge portion. An extension arm is selectively movable from a retracted position, closely adjacent the hypotenuse edge, to an extended ... | 10/03/2006 |
| 6816064 | Escape apparatus detecting an emergency situation and providing illumination A survival device for use in an emergency situation includes a battery, a lamp, and a detection circuit for detecting an occurrence of the emergency situation and for switching the lamp to be powered by the battery when such an occurrence is detected. In one form, t... | 11/09/2004 |
| 4736524 | Framing T-square and protractor There is disclosed a framing T-Square and protractor wherein the head of the T-Square and the elongated rule thereof are connected by means of a ballbearing allowing the rule portion to be free-swinging with respect to the head, which is in the form of a ... | 04/12/1988 |
| 4586263 | Pendulum level A pendulum level which is a combination pendulum and level. It includes a rectangular frame with no back and front panels and two spaced cross bars, a pendulum that is pivotally secured to one of the cross bars and detachably secured to the other cross ba... | 05/06/1986 |
| 4364175 | Grade Liner A grade liner which is used in cooperation with grade stakes to determine the grade within a ditch. Means are provided for establishing a horizontal line of sight a selected rise distance "A" above a grade stake. Plumb means are provided which intersect t... | 12/21/1982 |
| 4335522 | Up, down or horizontal plumb bob A transparent plumb bob having a fixed point and an associated movable point, to be aligned therewith for determination of a vertical line through a given exterior point, optionally including means for horizontal leveling and easily securing the bob inter... | 06/22/1982 |
| 3962693 | Motion detection device including a pendulum switch A motion detection device is characterized by an array of mutually spaced electrical contacts connected to one terminal of a pair of terminals having a voltage differential established therebetween, an electrically conductive first mass suspended between ... | 06/08/1976 |
