Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5888138 | Movable model object for use in games A movable model object which resembles a racehorse has a model supported on a base having wheels that run on a field of a horse racing game apparatus. The model includes front and rear legs as movable elements and a power transmitting mechanism for transm... | 03/30/1999 |
| 5603651 | Bubble-producing skipping toy A bubble producing toy includes a rod or tether having a circular ring at one end to loosely encircle the user's lower leg or ankle. A bubble producing mechanism is secured to the outer end of the rod and is operative to produce bubbles when twirled about... | 02/18/1997 |
| 4929216 | Rotating ring and character toy A cylindrical ring and a character having a number of extending parts that are circumscribed by a circle having a diameter equal to the inside diameter of the ring are readily combinable by a child to make a rotating toy. Insertion and removal of the char... | 05/29/1990 |
| 4915633 | Toy alphabet school bus A user-propelled toy school bus which as it travels along a playing surface exhibits through its side and rear windows the successive letters of the alphabet. These letters are printed along an endless scroll that is guided in a path running behind the wi... | 04/10/1990 |
| 4889516 | Plug-in module for motorized toy vehicle A power module which when plugged into an open compartment in the body of a motorless toy vehicle and switched on, then acts to drive the vehicle in a selected direction. The compartment is disposed above a coupling gear mounted on a wheel axle. The case ... | 12/26/1989 |
| 4601675 | Mechanized toy ball A mechanized ball includes a hollow sphere having a removable hatch through which a powered ball driving unit can be placed within the sphere and removed therefrom. The ball driving unit can be electrically or mechanically powered and may be in the form o... | 07/22/1986 |
| 4312149 | Transfer mechanism utilizing a pivotable holding member A transfer mechanism for use in a toy of the type incorporating "ball people" figurines to transfer the figurines from one location to a second location includes a base radially displaced from both the first and the second locations and a carrier which is... | 01/26/1982 |
| 4280300 | Toy vehicle A toy vehicle includes a body mounted on a plurality of ground engaging wheels to allow travel across a suitable surface. A speed indicating device is defined on the body and connected to the wheels as is a distance traveled indicating device. A sound pro... | 07/28/1981 |
