Abstract: Analysis of questionable signatures, with prevention of imitating signatures according to the modern celerity to accept or deny as valid a signature affixed on any kind of document with alphanumeric reference or without alphanumeric reference, by authenticating it with the naked eye and evaluating for such purpose a signature affixed on one or more obstacle(s) of any geometric shape and of any kind of material and any color, which are placed and stuck on the document to be signed or on another external support to the document to be authenticated, and such obstacle(s) impede the normal stroke of the ink instrument with which the signature is written, and the structure resulting from the signature over the obstacles is collated with the structure of the questionable signature and/or with the structure of the signature considered as indubitable.

Abstract: A protective athletic garment that provides cushioning effect to areas of wearer's body and shock absorbing capability, while keeping resistance to impact and collision during activities. The garment comprises an article of clothing which covers a portion of a wearer's body and a protective element attached into areas susceptible to injury. The protective element is preferably formed of a base layer of polyurethane shock absorbent foam and a top layer of thermoplastic polyurethane foil including flex zones and raised elements to provide high abrasion resistance and low friction sliding ability during falls. The protective element comprises ventilation holes and a plurality of grooves to stitch the protective element to the garment to create any style of garment. The protective element can be used for different portions of the wearer's body by varying the shape and/or size of the protective element to accommodate a variety of human body portions.