Patent claims define the scope of extend of protection an invention covers. In other words, claims specify what a patent does and does not cover. A patent claim is the most important part of a patent during drafting, prosecution, and litigation. Drafting patent claims is technical and requires both legal and technical expertise. 

As claims are the most important part of a drafting exercise, we advise that as a minimum the claims re drafted in a collaborative way by:

1. The inventor
2. a patent specialist (expert/lawyer)
3. A person technically experienced in the field

While there are many assistive tools for patent drafting on a do it yourself basis, but technical expertise and a third party technical opinion is helpful and adds significant value when drafting a patent.