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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 |
| 4768776 | Rowing exercise machine extension An exercise extension device is provided which is adapted to attach to existing rowing exercise machines allowing the user to exercise while in a fully reclined position. The apparatus comprises a padded platform which attaches behind the seat of the rowi... | 09/06/1988 |
| 4765615 | Exercising apparatus Exercising apparatus (10) including a seat (21) on which a user (U) is seated for exercising, a rear tensioning device (24) positioned behind the seat (21) and mounted for movement between opposed sides of the user (U), and a front tensioning device (28) ... | 08/23/1988 |
| 4759541 | Baby's walker with height adjustment apparatus The present invention relates to a baby's walker with height adjustment apparatus which includes a seat; a slidable base; two U-shaped tubes pivotally connected to each other in crosswise arrangement and disposed between said seat and said slidable base, ... | 07/26/1988 |
| 4759540 | Compact structure for a treadmill A compact structure for a treadmill includes an improved mechanism for adjusting the slope of the treadmill and an improved arrangement for transmitting power to the tread belt. A snap connection is provided between the handrail and control unit support s... | 07/26/1988 |
| 4759539 | Fold-down excercise apparatus An exercise apparatus comprises a plane formed by two elongated parts include a pivotal joint arrangement for accomplishing an angle between the parts of the lane. The plane of two parts comprises at the lower part thereof a stationary joint arrangement, ... | 07/26/1988 |
| 4757993 | Exercise devices with an adjustable lever arm Exercise devices with an adjustable handle and lever arm are provided for exercising the major muscle groups individually against a selected resistance. The exercise devices include a frame with a base and a leg, and a lever support is pivotably attached ... | 07/19/1988 |
| 4753434 | Hand held muscle builder A conventional hand held, manually operable exercise device for strengthening the hand and arm muscles in which a pair of hand engageable handles are movable toward one another to tension an intervening coil spring. A resistor is attachable to the exercis... | 06/28/1988 |
| 4749184 | Self-restoring kicking practice apparatus A kicking practice apparatus including a freestanding support frame having spaced-apart upstanding members mounted at their lower ends to a floor-supported primary base and rigidly connected at their upper ends by a reinforcing structure. The upstanding m... | 06/07/1988 |
| 4733858 | Multi-purpose exerciser This invention relates to a multi-purpose exerciser and in particular to one utilizing a throttling valve for presenting a selectable number of operable speeds to the user. The exerciser mainly includes two racks, a controlling button, a cross rod, an upr... | 03/29/1988 |
| 4732381 | Upper body rotation assembly for a back test, rehabilitation and exercise machin An upper body rotation assembly for a back test, rehabilitation and exercise machine designed for the isolated testing, rehabilitation and exercise of the lower back musculature of a person in rotation about a vertical axis is disclosed. The rotation asse... | 03/22/1988 |
| 4730829 | Exercise machine An exercise machine (2) includes side frame members (6). Electromagnetic brakes (62) supported on movable carriages (66) slide along side frame members (6). Carriage (66) includes a hinge (100) for allowing each brake (62) to pivot between multiple positi... | 03/15/1988 |
| 4729561 | Weightlifting power station A power station for use in weightlifting has a multistation configuration comprising two substantially rectilinear cages which are connected in abutting back-to-back relationship. Racks for mounting weights are formed on the cages. A horizontal bench pres... | 03/08/1988 |
| 4725055 | Lower body stabilization apparatus for a back test, rehabilitation and exercise machine A lower body stabilization apparatus for a back test, rehabilitation and exercise machine designed for the isolated testing, rehabilitation and exercise of the lower back musculature of a person in rotation about a vertical axis is disclosed. The lower bo... | 02/16/1988 |
| 4725056 | Leg stabilization for a trunk extension/flexion test, rehabilitation and exercise machine A leg stabilization apparatus for a trunk extension/flexion test, rehabilitation and exercise machine wherein a person secured to an input assembly of the machine engages in trunk extension/flexion motion. The apparatus comprises a popliteal pad assembly,... | 02/16/1988 |
| 4725054 | Low inertia counterbalance mechanism A low inertia counterbalance mechanism for eliminating the effects of gravity on an upper body mass of a person secured in an input assembly of a trunk extension/flexion test, rehabilitation and exercise machine is disclosed. The mechanism disclosed does ... | 02/16/1988 |
| 4721303 | Convertible multi-function physical exerciser A convertible physical exercising device adapted for performing a range of different exercises has a user-engageable movable member connected to a resistance through an elongated flexible element. The flexible element is trained through a final guide whic... | 01/26/1988 |
| 4712793 | Weight maximizer A weight adjustable base unit for a weight lifting device is provided and consists of a plurality of cylinder shaped weights, each being detachably inserted in holes of a pair of base plates which are secured on uppermost of adjustable weights of the weig... | 12/15/1987 |
| 4711448 | Lower body exercising and weight training device An apparatus for use in exercising selected lower body muscles and joints of a user's body. The apparatus is adjustable to accommodate users of various sizes and dimensions. The machine comprises a frame including a base and support members fixed to said ... | 12/08/1987 |
| 4709920 | Exercising apparatus An exercising apparatus for training the muscles of a human body includes a frame supporting a crank on a shaft which is attached to a pair of identical disks. The disks define several cam paths along which a cable is guided whose other end is connected t... | 12/01/1987 |
| 4709918 | Universal exercising apparatus An elongated base frame forms generally horizontal parallel tracks which support a pair of foot support platforms and carriages for independent longitudinal movement. A vertical column has a releasable pivot connection to one end of the base frame and sup... | 12/01/1987 |
| 4693468 | Exercise machine having pedals which extend radially against resistive means An exercise machine for exercising the forward and backward muscles in the upper and lower muscle groups. A first bidirectional exercise unit is attached to a frame to permit stand-up pedalling against resistance. A second exercise unit is attached to an ... | 09/15/1987 |
| 4690398 | Multipurpose rowing apparatus A rowing machine for exercising in which the ends of a pair of fulcrum bars are attached to the sliding seat and the other ends are equipped with handles. The point of attachment of a resistance means to the fulcrum bars are adjustable. The sliding seat h... | 09/01/1987 |
| 4685670 | Elastic tension exercising apparatus with multiple pass cable and pulley An exercising apparatus using an elastic or spring type resistance provides a relatively constant controlled resistive force throughout an entire exercising stroke. In the exemplary embodiments, a multiple pass pulley arrangement attached to elastic rubbe... | 08/11/1987 |
| 4684125 | Muscle building apparatus A muscle training apparatus comprising a force arm (1) which is rotatably mounted in a carrier (2) and which cooperates with a simple acting or double acting force applying means, especially a gas spring (8) which with one end is rotatably mounted in a br... | 08/04/1987 |
| 4640268 | Muscular rehabilitation apparatus for exercising human body appendages A muscular rehabilitation apparatus for exercising human body appendages through multiple geometric positions of the appendage with respect to the body including a support position with a curved track adjustably mounted with respect to a base and supporte... | 02/03/1987 |
| 4621807 | Leg and hip exercising apparatus A rotatable exercise mechanism for interacting with the body in order to perform exercises. The rotatable exercise mechanism includes a pulley mounted on the frame. A cable is secured to the pulley such that the cable can be wound in opposite directions a... | 11/11/1986 |
| 4606241 | Adjustable crank assembly A crank assembly having an adjustment member extending approximately parallel to and fixed to one end of a crank lever, a bearing arrangement adjustably affixed to said adjustment member, a pivot arm rotatably connected to said bearing arrangement, a peda... | 08/19/1986 |
| 4515363 | Weight lifting exerciser An exercising machine for especially training the muscles of the leg includes a base on which a pair of support tables is rotatably carried, one for each foot, a vertical standard on the base adapted to provide fixed hand grips for a standing user or a se... | 05/07/1985 |
| 4349193 | Lower abdominal twist machine An lower abdominal twist machine including a frame having weights slidably mounted in a cage with the weights drivably connected to a rotatably mounted seat for an individual together with a handgrip on the frame which is grasped by the individual in a se... | 09/14/1982 |
| 4256302 | Variable resistance exercising device An improved exercising device for exercising the legs of a user includes a frame member with a lever arm having one end pivotably attached thereto. The lever arm extends downwardly from the portion of the frame member to which it is pivotably connected, a... | 03/17/1981 |
| 4203593 | Work table for occupational therapy A work table for use in occupational therapy comprising a table top supported on a platform for adjustment of its working surface from a horizontal to an angular position relative to the horizontal, one or more flexible cords entrained about pulleys rotat... | 05/20/1980 |
| 4125258 | Limb exercising apparatus Apparatus to be used for exercising the limbs, and particularly the legs. The apparatus includes a support upon which a person lies with his legs extending beyond an end thereof and resting on a pair of operating bars. Each bar projects from beneath the s... | 11/14/1978 |
