Elements of a claim
a.    Preamble: “A writing tool”, “A composition of matter”, “A method of…” Provides a general introduction. Is not limiting on the rights of the inventory unless it breathes “life and meaning” into your claim.
(A)    Not limiting: “A diagnostic medical imaging system”
(B)    Possibly limiting: “A diagnostic medical imaging ultrasound system capable of being housed on a portable support
b.    Transition: 3 common ones
(A)    “Comprising”: Broad. If elements of patent are A B and C, and someone does A B C & D, there is infringement.
(B)    “Consisting of”: Narrow. Case where what is cool about invention is you did it in only X elements.
(C)    “Consisting Essentially of”: Intermediate. If an invention consists essentially of elements A, B, and C, the claim would cover a variant having the additional element D only if D did not make the variant essentially different from the claimed invention.
c.    Body: Introduce specific limiting elements, i.e., what makes up your invention.
(A)    Usually want each element introduced in a new clause
(B)    Must be clear what the relationship is between elements.