Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 8157054 | Aquatic ladder for marine applications The aquatic ladder was designed for ease of use, rather than ease of storage. It has wide, deep treads, arranged like a staircase, with side and upper railings which make it easy to enter or exit the water, even by elderly people, tired individuals, those carrying a... | 04/17/2012 |
| 7845468 | Ladder bracket A ladder bracket for hanging a ladder in a trench box is disclosed. The bracket includes a frame, a first arm and a second arm, and a lip. The first arm and second arm each have a first end attached to the frame and a second end extending in a direction away from th... | 12/07/2010 |
| 7637350 | Portable barge access ladder The portable barge access ladder has a pair of coaming frame members positioned outside of a barge coaming with a plurality of safety treads there-between forming a coaming ladder portion. The ladder includes transverse frame members extending across the barge coami... | 12/29/2009 |
| 7464792 | Aquatic ladder adapted for marine applications The aquatic ladder was designed for ease of use, rather than ease of storage. It has wide, deep treads, arranged like a staircase, with side and upper railings which make it easy to enter or exit the water, even by elderly people, tired individuals, those carrying a... | 12/16/2008 |
| 7437857 | Compression anchor A compression anchor for holding a support member, such as a cylindrical handrail, is disclosed. The anchor includes a body having a cavity and a wedge portion that connects to the body using thick threads, such as 2-4 ACME 2-G threads. The wedge is substantially cy... | 10/21/2008 |
| 7367425 | Graduated pole strap The graduated pole strap apparatus can be wrapped around a pole, tree or the like and secured on each end to the rails of a ladder. Further, it contains markings calibrated in proportion to the length of the ladder to show whether the ladder is secured at a safe inc... | 05/06/2008 |
| 7341126 | Ladder support systems A ladder support system that may be mounted on a ladder rung or other securing structures and may further be shaped to provide lateral support to the ladder when a pole or other supporting structure is positioned on the ladder support. The ladder support may also be... | 03/11/2008 |
| 7327109 | Adjustable bridge for acoustic stringed instruments A bridge for providing adjustable active string length on acoustic stringed musical instruments comprised of a concavity surrounding a plurality of individually adjustable saddles that are arranged individually and independently to support each string and be freely ... | 02/05/2008 |
| 7240947 | Compact truck tailgate and general purpose utility ladder An exemplary embodiment sets forth an apparatus, including a non-collapsible single unit stair comprising: a pair of opposing side rails supporting at least a top step and a bottom step; a coupler adapted to couple the apparatus to an edge of a horizontal surface; a... | 07/10/2007 |
| 7237649 | Tree ladder A ladder for climbing trees and other vertical elements having a pair of spaced stiles, a plurality of rungs between such stiles and stand off elements on the stiles or rungs for spacing the ladder from the object to be climbed which will maintain the ladder in gene... | 07/03/2007 |
| 7207416 | Reinforcement pad for protecting a swimming pool liner from becoming damaged by a swimming pool ladder A reinforcement pad for protecting a liner of a pool from damage caused by a user ascending and descending a pool ladder having two upper ends and two lower ends. The reinforcement pad has a substantially oval pad base and a substantially cylindrical socket extendin... | 04/24/2007 |
| 7162969 | Boat Platform A platform unit (2) is seated on the tail (5) of a hull (1) of a boat and may be lowered by powered actuator means (8) down guides (7) on an incline (6) to descend into the water. This exposes steps (62) in the inclin... | 01/16/2007 |
| 7163082 | Climbing stick apparatus A climbing stick apparatus includes a plurality of stick members, each of which includes a fastener reception portion at each stick member end and a plurality of foot-support-reception channels. A plurality of member-to-member couplers and fasteners are provided for... | 01/16/2007 |
| 7150129 | Modular step system for pools A modular step system for in-ground swimming comprising a bottom central hub, a brace assembly, a top central hub, a tread support assembly, a step form and a liner. The components of the modular step system interlock and snap together without fasteners. Also, the c... | 12/19/2006 |
| 7117820 | Bird cage ladder A bird cage ladder equipped with a locking connection mechanism that is biased toward a closed position and is easy to install and remove from a bird cage. Particular embodiments of the present invention have the flexibility to connect with various shaped bird cages... | 10/10/2006 |
| 7059813 | Guide system for a glass rack stake A guide is attached to the top of a glass rack on a glass transporting vehicle. When attaching a brace to the rack, the top stake is engaged to the guide. The guide automatically directs the top stake into its corresponding spot. ... | 06/13/2006 |
| 7017709 | Marine safety ladder apparatus A buoyant marine safety ladder apparatus includes a ladder that is pivotably mounted to a seawall or other support platform and is alternatable between a retracted condition, wherein the ladder is floating above the water, and a deployed or extended condition, where... | 03/28/2006 |
| 7011045 | Pet ramp A generally horizontal platform has connected to a first end thereof a sloping ramp that extends into the water of a swimming pool. The ramp is provided with traction enhancing ribs to enable a pet to extricate itself from a pool should it accidentally fall in or ti... | 03/14/2006 |
| 6994186 | Helicopter lineman's ladder A rigid, unitary ladder is provided having one end configured to be attached to a powerline support tower after the ladder is dropped by helicopter to a lineman previously offloaded onto the tower. The ladder includes a first section which extends outwardly from the... | 02/07/2006 |
| 6994363 | Tailgate extension A vehicle tailgate extension apparatus and method of using the same. The tailgate extension apparatus generally includes a U-frame member, a plurality of hinge elements, and a plurality of side braces. The U-frame member may be locked into a plurality of operative p... | 02/07/2006 |
| 6966405 | Swimming pool stairs A stair portion for a stair assembly for a swimming pool, comprising a bottomless hollow body having lateral surfaces and a top surface defining steps. The bottomless hollow body is adapted to be received in a pool with bottom edges of the lateral surface lying agai... | 11/22/2005 |
| 6948589 | Tree stand and climbing devices A tree stand and/or climbing device of multiple designs preferably using industrial machinery style belts to provide maximum strength and gripping power. The belts are preferably made of tough rubber compounds and inlaid with various high strength fibers and other m... | 09/27/2005 |
| 6935463 | Safety support for ladders A ladder safety support for use with an existing ladder is disclosed. The support includes an attachment assembly for removable connection to the lower end of the ladder and one of two interchangeable foot assemblies for supporting the ladder on a surface. The first... | 08/30/2005 |
| 6932193 | Boat bow access ladder for trailer A boat ladder attached to a trailer for easy access to a bow of a boat. The ladder comprises two side rails with spaced-apart steps or rungs between the side rails, the lower portion of one of the side rails curving a predetermined distance toward the other side rai... | 08/23/2005 |
| 6920841 | Unitary construction animal feeder and method for manufacture An animal feeder has a feed hopper that has a filling end and a feeding end. The proximate ends of three or more legs are permanently attached to the feed hopper. A skid assembly is permanently attached to the distal ends of the three or more legs. ... | 07/26/2005 |
| D506583 | Pet pool ladder | 06/21/2005 |
| 6769514 | Helicopter lineman's ladder and method for energized powerline repair A rigid, unitary ladder is provided having one end which attaches to a powerline support tower after the ladder is dropped by helicopter to a lineman previously offloaded onto the tower. The ladder includes a first section which extends outwardly from the tower and ... | 08/03/2004 |
| 6719093 | Extension ladder and tree stand An extension ladder and tree stand for supporting a seated or standing person on an elevated platform against a tree trunk for hunting, photography, and the like. The ladder and platform collapse into a compact size and shape for carrying by a person. The ladder is ... | 04/13/2004 |
| 6681892 | Ladder and associated method for securing same to object A ladder for negotiating an object includes a frame and a lever coupled to the frame. The lever is movable relative to the frame in response to an actuating force applied to the lever to move the lever into engagement with the object to secure the ladder ... | 01/27/2004 |
| 6675935 | Helicopter lineman's ladder and method for energized powerline repair A rigid, unitary ladder is provided having one end which attaches to a powerline support tower after the ladder is dropped by helicopter to a lineman previously offloaded onto the tower. The ladder includes a first section which extends outwardly from the... | 01/13/2004 |
| 6622822 | Bunk ladder An adjustable ladder with self-storing features and suitable for installation in the sleeping berth of an over-the-highway tractor. The ladder includes an upper and lower member. The upper member includes first and second side rails and at least one step ... | 09/23/2003 |
| 6598562 | Pet pool safety system A pet pool safety system comprising several components in combination. First provided is a platform which is fabricated of a water resistant material. The platform has a generally rectilinear configuration with a plurality of pin receivers, a plurality of... | 07/29/2003 |
| 6578664 | Window guard with quick release latching system A quick release latched security window guard having a framework attached to a building exterior overlying a window is held with a cam latch system including a cam rod extending through the building wall, with an end protruding into a hollow member formin... | 06/17/2003 |
| 6547035 | Ladder module A ladder module for use in climbing trees, hunting or other purposes. The module includes a support member having a pair of support brackets mounted at the top and bottom ends of the support member. The brackets are generally V-shaped and include a number... | 04/15/2003 |
| 6367584 | Ladder for above-ground pools with incorporated foot rinsing system A ladder for aboveground pools with incorporated foot rinsing system including a ladder portion adapted for coupling with a swimming pool. The ladder portion is comprised of a pair of elongated vertical spaced apart rails. The ladder portion includes a pl... | 04/09/2002 |
| 6305497 | Mast ladder assembly A mast ladder for going up the mast of a sailing craft having a mast with a sail slide extending along the length of the mast including a halyard slide, a plurality of connecting rods, a top step and a plurality of universal steps. The mast ladder is rais... | 10/23/2001 |
| 6138792 | Portable climbing apparatus A portable climbing apparatus comprising segments which can be stacked end to end to form a ladder and which can be nested together for easy transportation.... | 10/31/2000 |
| 6076634 | Mast ladder assembly A mast ladder for going up the mast of a sailing craft having a mast with a sail slide extending along the length of the mast including a halyard slide, a plurality of connecting rods, a top step and a plurality of universal steps. The mast ladder is asse... | 06/20/2000 |
| 6000494 | Swimming pool steps A drop-in stair assembly for a pool which comprises alternating treads and risers forming a series of steps extending between first and second side walls and with a pair of L-shaped connectors, each of the connectors having first and second arms and an el... | 12/14/1999 |
| 5971105 | Escape ladder An escape ladder stored in an interior wall of a building, beneath a window. The ladder is deployed by placement through a window with a storage container providing a step for ease in exiting. Ladder steps are secured by a flexible strap with each step in... | 10/26/1999 |
