Abstract: The apparatus and method described herein provides for creating multiple spatial patterns, such as magnetic patterns on credit cards. The invention includes storage of information from which patterns may be created, a pattern creation device for creating the spatial patterns, and control whereby the information which is stored is selectively utilized to cause the pattern creation. This allows multiple desired patterns to be simulated, allowing convenient replacement of a number of separate pattern carrying devices.

Abstract: The apparatus and method described herein provides for creating multiple spatial patterns, such as magnetic patterns on credit cards. The invention includes storage of information from which patterns may be created, a pattern creation device for creating the spatial patterns, and control whereby the information which is stored is selectively utilized to cause the pattern creation. This allows multiple desired patterns to be simulated, allowing convenient replacement of a number of separate pattern carrying devices.

Abstract: A stabilized turf (10) particularly suitable for athletic fields includes a mat (18) interposed between upper (24) and lower (16) layers of growth media, the mat (18) having a horizontally disposed, biodegradable primary backing (22) and generally upwardly extending fibers (20) secured thereto, wherein the fibers (20) extend above the upper layer (24) of growth media. Natural grass plants (26) extend upwardly above the upper layer (24), with the roots extending down through the backing (22) and into the lower layer (16). The mat (18) stabilizes root growth, particularly during initial grow in. The biodegradability of the primary backing (22) results in a loss of all or most of its horizontal structural integrity within a predetermined time period. The primary backing (22) may be treated with a decomposition agent to control the predetermined time period for decomposition, a stabilizing agent to assist in holding the upright fibers (20) or a growth agent for the natural turf grass.

Abstract: A stabilized natural turf surface particularly suitable for athletic fields includes a mat interposed between upper and lower layers of growth media, the mat having a woven biodegradable backing and upwardly extending artificial fibers secured thereto, wherein the fibers extend well above the top of the upper layer. Natural grass plants grow in the upper layer, with the crowns being located in the upper layer of growth media and the roots extending down through the backing and into the lower layer. The mat helps to stabilize root growth, particularly during the first few years. The biodegradability of the backing results in its eventual decomposition, so that after a predetermined time the turf surface may be aerated all the way down to the lower layer without adversely affecting the mat and the mat can be top dressed beginning immediately after turf growth occurs. The biodegradability also prevents the creation of an agronomic barrier between the upper and lower layers.

Abstract: A temporarily stabilized natural turf conforms to a foundation of uniform or nonuniform topography, for instance a golf course green, and includes a flexible biodegradable primary backing with biodegradable fibers tufted thereto, an upper sand-based fill layer extending above the primary to about the tops of the fibers, and natural grass plants supported within the fill layer. The natural grass plants have blades which extend above the fill layer and the fibers to form a natural grass playing surface. The crowns of the natural grass plants reside just beneath the fill layer. The roots of the natural grass plants extend downwardly through the fill layer and through the root permeable and water permeable primary backing. The stabilized turf is grown at a sod farm and transplanted to the use site, and the primary backing helps to carry the sand-based fill layer. Once installed, the roots grow into the foundation relatively quickly, reducing the time needed to achieve a durable natural turf.