A microcomputer includes a read only memory (ROM) with ROM areas in a built-in ROM for emulation by a random access memory (RAM) for fine tuning a program to be written into the ROM. The microcomputer further includes RAM areas in a built-in RAM and an assigning unit for assigning at least one RAM area to each of the ROM areas. In the emulation mode, each of the ROM areas can be replaced with a corresponding RAM area.

An embossed thermoplastic film having a first side having a substantially smooth surface and a second side having a partially embossed surface on its surface.

A cover for a recreation area including a horizontally disposed cover structure suspended by an upright support member; which cover structure being moveable between a position preventing access to the area and a position clear of the area to permit access thereto. The cover structure may be mounted to be raised or lowered while remaining horizontal or may be pivotally moveable between a horizontal position and a vertical position. Desirably the cover structure can also move in a horizontal plane...

A convertible tennis-court enclosure, comprising a plurality of parallel supporting beams and two closure elements between two of the supporting beams to be extended simultaneously along the supporting beams, each element including a series of purlins arranged to slide on the supporting beams and connected in two's by a portion of a canvas fixed to the purlins, of which the length is equal to half that of the beams.

A radar altimeter system for measuring, from an aircraft flying above tropical forest areas, the height of the ground and the height of the forest canopy above the ground comprising a transmitter, a receiver for detecting return pulses from the ground and forest canopy, timing means for measuring the time of arrival at the beginning and end of each received pulse and averaging the said times, means for examining the received pulse duration and preventing pulses with a shorter time duration than ...

Tooth positioner comprising several integral tooth engaging portions formed of materials having different hardness, the harder portions of which assist in anchoring the tooth positioner in its proper position in the patient's mouth. Further, a method of making such tooth positioners by enclosing dental counterpart of the mold to form a first portion of the positioner, placing at least one other material into the mold in interfacing relation to the first portion to form a second portion of the to...

An absorbent article comprising a pad of absorbent material sandwiched between a backing sheet and a top sheet. The absorbent material is a wood fluff or the like and the absorbent article is embossed on either side or both sides so that the absorbent material is compressed at the discrete areas. The balance of the absorbent material remains substantially uncompressed to form spaced densified areas and areas of less density to enhance fluid spreading characteristics and to reduce wetback.

Tooth positioner comprising several integral tooth engaging portions formed of materials having different hardness, the harder portions of which assist in anchoring the tooth positioner in its proper position in the patient's mouth. Further, a method of making such tooth positioners by enclosing dental counterpart of the mold to form a first portion of the positioner, placing at least one other material into the mold in interfacing relation to the first portion to form a second portion of the to...

A method of geochemical prospecting in submerged areas comprising the taking of samples of the water at or close to the bottom at spaced locations in such an area, which samples are then analyzed to determine the concentration therein of leakage products indicative of the presence of subterranean petroliferous deposits and the results of such analyses are correlated with sample location to provide information concerning such deposits. The method also includes the taking of samples of the earth f...

A game comprising a playing surface having first indicia thereon defining a plurality of game symbols. Second indicia on the playing surface define a plurality of game categories. The second indicia is arranged on the playing surface so that the game symbols are in spaced relationship with the game categories. Third indicia on the playing surface define a plurality of playing areas. Each playing area is in spaced register with one of the game symbols and one of the game categories so that select...