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 |
| 8156777 | Lock and key with double code pattern The invention relates to a lock and key combination including a cylinder lock with a rotatable key plug having a key slot for receiving a flat key blade (100) on a key, and at least two side locking tumblers (201a, 201b; 301, 30... | 04/17/2012 |
| 8061168 | Lock and key system with extra code combinations A key with a very large number of code combinations. The key includes a longitudinally extending key blade with a wave-like side code pattern forming a wave-like surface including a ramp portion at a free end portion of the key blade with the wave-like guide being f... | 11/22/2011 |
| 7870771 | Lock device with a lock cylinder and a key A lock device having a key and a lock cylinder. The lock cylinder includes a fixed cylinder housing and a cylinder core mounted to rotate therein. The key shaft (10.3) has an edge profile and may be inserted in a key way of the cylinder core in which displace... | 01/18/2011 |
| 7810364 | Lock and key system with extra code combinations A high security lock and key system with an increased number of code combinations wherein the blade of the key has a wave-like guiding surface at the side of the key blade which, upon insertion into an associated lock having a rotatable key plug, engages with one or... | 10/12/2010 |
| 7690232 | Locking device with a locking cylinder and a key A locking device having a locking cylinder and a key. The locking cylinder includes a cylinder core with tumblers in a cylinder core, which is rotatably mounted in a cylinder housing. Standard coding for the key is produced by a step with longitudinal profiling on a... | 04/06/2010 |
| 7665336 | Lock and key system with extra code combinations A lock and key system with a very large number of code combinations. The lock (200) includes side locking tumblers (206) having pivoting fingers (208) with asymmetric key contacting portions (220r), which engage with a wave-like co... | 02/23/2010 |
| 7665337 | Profiled key for cylinder locks A key for use in a cylinder lock with a rotatable key plug having a profiled keyway including a longitudinal profile rib at a side wall of the keyway. The key has an elongated, substantially flat key blade (120; 120′) having a longitudinal profile groove ( | 02/23/2010 |
| 7647799 | Key combination element in key blank and key A key blank including a generally elongate shaft portion defining first and second generally flat oppositely directed side surfaces, joined by edge surfaces, at least one of the first and second side surfaces cuttable to form key cuts that define a key combination s... | 01/19/2010 |
| 7487653 | Lock and key system with extra code combinations A high security lock and key system with an increased number of code combinations wherein the blade of the key has a wave-like guiding surface at the side of the key blade which, upon insertion into an associated lock having a rotatable key plug, engages with one or... | 02/10/2009 |
| 7421869 | Cylinder lock device Tumbler pins 2 are movably housed in a plug 1. A locked/unlocked state is determined by the turning position on the moving direction center axes of the tumbler pins 2. An unlocking key 4 to be inserted into the plug 1 is provided w... | 09/09/2008 |
| 7412860 | Key blank and key A key blank or key has a rectangular parallel metal shaped blade which has side edges formed with grooves for cooperating with a complementary shaped keyway; the sides of the blank having a portion grooved for registration, another portion grooved for top-level hier... | 08/19/2008 |
| 7392676 | Key blank with projection A key blank for a cylinder lock comprising a bow 308, a blade longitudinally extending from the bow to a tip, and having a longitudinally extending upper edge 306 to be cut with coded bitting for mating with a tumbler stack of a cylinder lock. A projec... | 07/01/2008 |
| 7377146 | Cylinder lock with an axially moving sidebar A cylinder lock plug that utilizes an axially moving sidebar. The sidebar is displaced axially by a key positioning mechanism on the blade of a uniquely configured key. Also on the key are unique short grooves on the lateral sides of the key blade running substantia... | 05/27/2008 |
| 7370502 | High security lock and key blade combination A high security cylinder lock (1) and key (2) combination comprising a cylindrical shell (140), a key plug (130) which is rotatably mounted in the shell (140), a longitudinal key slot (100) in the key plug, and at least one ... | 05/13/2008 |
| 7337639 | Method of making a key for a pin tumbler lock An exemplary method of making a key is provided. A bitted surface is formed in a key blade of a key blank. A groove is formed in a first side of the key blade. At least one receptacle is formed in the groove. A notch is formed in the groove adjacent to the at least ... | 03/04/2008 |
| 7240525 | Master-keyed cylinder comprising tumblers and corresponding master key Master-keyed pin tumbler lock and relative master-key, where each pin has an inner window with an outer protuberance, which a spring acts upon and an inner projection, which the key acts upon, giving rise to the movement of the pin. The inner projections are at diff... | 07/10/2007 |
| 7207200 | Key with compound actuator ramps in recessed longitudinal channel A key blank and key for mating with a core having a plurality of cutouts penetrating from the core surface to the keyway, and a plurality of activator inserts and filler inserts, such that the installer can locate one or more activator inserts in any of the cutouts,... | 04/24/2007 |
| 7181941 | Lock system with improved auxiliary pin tumbler stack In a pin tumbler-type cylinder lock having an auxiliary tumbler stack, the bottom pin of the auxiliary tumbler stack has a recessed underside for receiving a projection on the key to form a detent. The invention provides an additional functionality that has not prev... | 02/27/2007 |
| 7174757 | Lock cylinder and key set Disclosed is a lock cylinder and key set, which includes a lock cylinder, which has a keyway with two keyholes separated by a partition, and a key, which has two blades insertable into the two keyholes of the keyway for acting against respective pins in the lock cyl... | 02/13/2007 |
| 7159424 | Lock and key system with extra code combinations A high security lock and key system with an increased number of code combinations is disclosed. The system is of the kind where the blade of the key has a wave-like guiding surface (104) at the side of the key blade which, upon insertion into an associated lo... | 01/09/2007 |
| 7140214 | Electro-mechanical cylinder lock-key combination with optical code An electromechanical cylinder lock-key combination includes a cylinder housing and a cylinder core rotatably arranged in the cylinder housing and having a key-way for receiving a key. A plurality of key actuated moveable blocking elements block the rotation of the c... | 11/28/2006 |
| 7100409 | Burglarproof lock core structure The present invention provides a burglarproof lock core structure which forms a curved passage between a key slot of a plug and a lower pin chamber, such that at least a bending concave surface offsetting the center of the key slot is formed at one side, and cone ap... | 09/05/2006 |
| 7040126 | Discriminating mechanism for a pin tumbler lock A pin tumbler lock is provided with one or more additional chambers for housing a secondary locking member for engagement with a portion of a key. The invention also provides a lock system comprising a plurality of locks, each lock including two chambers. The lock s... | 05/09/2006 |
| 6986272 | Ignition lock for a motor vehicle The invention relates to an ignition lock (1), in particular for a driving authorization system in a motor vehicle that interacts for authentication purposes with an electronic key or the like via an encoded operating signal. The ignition lock (1) cont... | 01/17/2006 |
| 6973814 | Safety key and locking cylinder, and locking system with such safety keys and locking cylinders The safety key has a shank (6) which is provided with a plurality of control surfaces (7) for properly positioning tumblers and has a front end and a rear end (6a, 6b). At a front end (4a), the rotor (4)... | 12/13/2005 |
| 6957556 | Disk tumbler lock and key, improved means and methods of manufacturing for An improved disk-tumbler lock and key for use with a gun-lock device includes a key specifically adapted to be ring-mounted so that it may be worn by and is thus available for the user at all times. The particular shape of the key includes those characteristics whic... | 10/25/2005 |
| 6945082 | Key blank, key and master keying system A key blank, key and master keying system for a twisting tumbler sidebar lock of the type where the sidebar is blocked or unblocked by a selectively positioned longitudinally extending slider, has a key blank with a slider contacting surface on a rib on the blank be... | 09/20/2005 |
| 6925844 | Lock having a helical keyway and accompanying key and methods therefor The present application advantageously provides at least one keyway in a lock core that poses tremendous difficulty for a lock breaker by not allowing the lock breaker to see all of the pin tumblers in the keyway. The keyway according to a preferred embodiment of th... | 08/09/2005 |
| 6912881 | Security reversible key and locking system The security reversible key with an assigned cylinder (Z) has a blocking groove (BN) with a coded blocking depth (B1, B2, B3), which runs parallel to the axis of the key (x) from the tip of the key to at least the first position (P1) of a... | 07/05/2005 |
| 6851292 | Lock-key system The invention relates to a lock-key system comprising a flat key (1), which is insertable into the keyway of a cylinder core (3), wherein grooves (4) and ribs (5) inside the keyway are assigned to corresponding ribs (5a) and... | 02/08/2005 |
| 6842742 | System for providing early warning preemptive postal equipment replacement An improved system for providing early warning preemptive postal equipment replacement. Selected performance parameters the postal equipment are monitored and compared against predetermined operational boundaries. The system is capable of providing for variability i... | 01/11/2005 |
| 6823702 | Cylinder lock-key combination A cylinder lock-key combination including a cylinder housing, a key and a plug which has a circular-cylindrical barrel surface and which is rotatable in an opening in the housing. The barrel surface of the housing includes a key recess whose width exceeds its depth,... | 11/30/2004 |
| 6799447 | Cylinder lock-key-combination A cylinder lock includes a turnable lock cylinder located inside a lock body and a set of code locking discs located inside the lock cylinder. Each locking disc has a key opening and is turnable in the lock body in a first turning direction from an initial position ... | 10/05/2004 |
| 6758074 | High-security round key and lock therefor A key has a blade formed with a part-cylindrical face and with a pair of relatively shallow, outwardly open, and generally parallel but spaced grooves formed in the face extending generally longitudinally in a nonstraight path and a relatively deep and outwardly ope... | 07/06/2004 |
| 6698264 | Core assembly for a lock A core assembly for a lock includes a core, a sleeve, and a housing. The core has a keyhole longitudinally defined therein. An elongated slot is defined beside and communicated with the keyhole. Multiple lower lock balls are received in the core and not a... | 03/02/2004 |
| 6681609 | Moveable element key and key handle and lock A key is provided with an actuator. The key also has operation structure and interaction structure. When the key is inserted into a lock, a force is applied to the operation structure and the position of the interaction structure is altered. The movement ... | 01/27/2004 |
| 6666057 | Lock with a fixable key A lock with a fixable key includes a shell, an upper half core, a lower half core, an elastic member and a fixable key. The upper and the lower half core contained in the shell respectively have a lengthwise passageway for a flexible moving member of the ... | 12/23/2003 |
| 6615628 | Picklock-proof key slot for a lock device and a key thereof A picklock-proof key slot for a lock device and a key thereof, which comprises a rotary cylinder and a lock casing, between which plural upper tumblers and lower tumblers are furnished; the center of the rotary cylinder is provided with a key slot; under ... | 09/09/2003 |
| 6584819 | Lock with two layers of lock mechanism A lock with two layers of lock mechanism, which comprises a body casing, an upper lock body, a lower lock body, a connection plate and a key; the chamber of the body casing is used for mounting the two lock bodies; the two lock bodies are connected togeth... | 07/01/2003 |
| 6532781 | Built-in safety device and key for a safety lock The invention relates to a built-in safety device comprising a housing (3) and a rotor (4) mounted therein. Tumblers (8) are mounted in the housing (3) and in the rotor (4). The maximal length (A) of the built-in safety device (1) is approximately 40 mm, ... | 03/18/2003 |
