An object can be perceived from multiple viewing angles such as top, bottom and front views. But a drawing can capture only one view at a time. That is why a patent application demands...

A provisional patent application (PPA) is used by an applicant to obtain an early filing date and dodge the costs associated with filing and prosecution of a non-provisional application, which needs to be filed...

Patent drawings assist in the understanding of an idea/invention. Which is why, patent laws often require atleast one patent drawing (also known as patent illustration) of the idea/invention to be furnished by the patent...