Patents - Drawings

Drawings must be included in a patent application only when they are necessary for understanding the subject for which a patent is sought. If drawings are omitted, the commissioner of patents can require that they be submitted within two months from the time that the inventor receives notice. Drawings that are submitted after that time cannot be used with the application, and a patent can be denied due to the inadequacy of the specification.

The commissioner can require that the inventor provide a model of the invention. In addition, when the invention involves a composition of matter, the applicant might have to furnish a specimen of it for inspection or experimentation.