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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 |
| 7331148 | Stud for concrete forms and forms using such studs A concrete form comprises cross members, plywood, and metal studs. The studs include a front wall, a rear wall, and a pair of side walls, the walls arranged to form a generally rectangular cross-section. A pair of inner walls extends between and perpendicular to the... | 02/19/2008 |
| 7229062 | Retention apparatus and method for stabilizing concrete forms Presented is an apparatus for stabilizing the form boards or members that define a cavity to receive wet concrete. The apparatus includes metal stakes having two sets of through-bores. The through-bores of one set are perpendicular to the through-bores of the other ... | 06/12/2007 |
| 6880304 | Structural thermal framing and panel system for assembling finished or unfinished walls with multiple panel combinations for poured and nonpoured walls A novel structural thermal framing and panel system for assembling finished or unfinished walls with multiple combinations for poured and nonpoured walls comprising of a permanent structural framing stud which can be adjusted to different wall thickness, a plurality... | 04/19/2005 |
| 6698710 | System for the construction of insulated concrete structures using vertical planks and tie rails An improved system and methods for forming foundations, walls, buildings and other structures having one or more walls made of concrete or other pourable, hardenable materials. The system uses substantially rigid forming panels and is "open" in that formi... | 03/02/2004 |
| 5209039 | Apparatus for interconnecting concrete wall forms An apparatus for interconnecting a pair of spaced-apart form panels includes a tie having opposing ends inserted through apertures in the panels, and retainer plates on each end to lock the panels in position. Each tie includes an elongated strap having a... | 05/11/1993 |
| 4987719 | Reinforced concrete building construction and method of forming same A reinforced concrete building structure (10) and method of forming, including first forming a steel framing form (18) of cold formed channel shaped structural steel members of a thickness between 1/32 inch and 3/8 inch including vertical framing members ... | 01/29/1991 |
| 4938449 | Tie for concrete forms A tie for concrete forms includes an elongated strap with opposing first and second ends. The strap has an upwardly projecting intermediate portion which prevents the movement of form panels inwardly on the strap. A notch in each outer end of the strap re... | 07/03/1990 |
| 4936540 | Tie for concrete forms A tie for concrete forms includes an elongated strap with opposing first and second ends. The strap has an upwardly projecting intermediate portion which prevents the movement of form panels inwardly on one end of the strap. A notch in the first end of th... | 06/26/1990 |
| 4805366 | Snaplock retainer mechanism for insulated wall construction An improved snap lock retainer mechanism for insulated wall construction apparatus for pouring a composite wall structure which includes a pair of outer poured concrete layers separated by a high density foam insulating panel mounted between the concrete ... | 02/21/1989 |
| 4551961 | Method of constructing a modular unit A modular structure is constructed in which includes a wall formed of an inner and outer panel defining a cavity therebetween, wherein a perforated stud is disposed between the inner and outer panels, with one of the panels being secured to a first portio... | 11/12/1985 |
| 4545163 | Heat insulated tie rod for concrete wall members An improved heat insulated tie rod allowing to reduce local heat insulation defects of concrete or stratified, concrete wall members. The tie rod includes stoppers for setting and holding together a pair of frame walls in spaced apart relationship with, i... | 10/08/1985 |
| 4426061 | Method and apparatus for forming insulated walls A method and apparatus is disclosed for forming insulated walls by pouring concrete directly on a form made in part of insulating material which will remain in place after the concrete sets. An apparatus for spacing the sheets of insulating material from ... | 01/17/1984 |
| 4401291 | Concrete wall form with safety attachment A concrete wall form with an attachment inserted between extending abutting flanges of form panels to secure a workman's safety belt, the attachment being pivotally mounted and comprising an oval plate having two spaced circular holes.... | 08/30/1983 |
| 4300747 | Flat shoe form tie bracket for use with concrete forms A snaptie shoe assembly having a wedge engaging slot at each end in combination with a pair of snap-on shoes, one for each end of the snaptie, which shoes have a slotted rib with the rib walls and the slot configuration engaging when the rib is interposed... | 11/17/1981 |
| 4239173 | Concrete construction form and tie rod An improved concrete form and tie rod, the concrete form and tie rod being constructed to facilitate disassembly of concrete form assemblies. The tie rods and concrete forms and structured to permit the ends of the tie rods to be broken off following comp... | 12/16/1980 |
| 4210306 | Safety key and locking means therefor for use with concrete wall form panels A safety key designed specifically for use in connection with concrete wall form panels of the "Steel-Ply" or metal-encased type. The key affords an anchor eyelet or hole for receiving the hook which invariably is provided on one end of a safety belt that... | 07/01/1980 |
| 4145024 | Form for reinforced concrete wall A form for poured concrete walls includes a plurality of prefabricated, interconnected form panels which are positioned end to end, in two, spaced apart rows to form a wall cavity therebetween. Each pair of associated, opposed form panels has at least two... | 03/20/1979 |
