The TC Tools patented design creates opposing concave and convex shapes within the same compound head. In our patent claim, this is technically described as: “Opposing Parabolic Expressions“.

Most hand tools have only one dedicated leading edge. Examples include hoes or rakes for pulling, and shovels for digging. Until now, none of these tools have had two leading edges, combined in the same tool with a curved transition. This curve positions each leading edge at an optimal angle. TC Tools are uniquely configured for pushing, pulling and digging, all with one tool.

The term Curvilinear combines two very different concepts in the same word. It may seem like an oxymoron at first, since how can something simultaneously be curved and linear?

In geometry, curvilinear coordinates are a system of lines that are curved to describe 3-dimensional spaces. What matters in regard to protection of this patent is that all the prior art and previous patents “depicted in art and described in the claims” employed a straight transition between two leading edges. In TC Tools, this transition is uniquely curved.

From an IP perspective, if any individual or company attempts to market a tool with a curved transition, no matter how slight, it would be an infringement on TC Tools patents.

The WIPO Patent Cooperation Treaty [PCT] assists applicants in seeking patent protection internationally for their inventions, helps patent offices with their patent granting decisions, and facilitates public access to a wealth of technical information relating to those inventions.

By filing one international patent application under the PCT, applicants can simultaneously seek protection for an invention in a large number of countries.

TC Tools Patent Cooperation Treaty Number: PCT/CA/2010/001238