Moreover, we didn't take out the necessary patents, so.

Equally, ensure that you have the necessary patents or design registrations in place for each destination country before you begin exporting.

Prior to the invention, Brooks worked for the Pennsylvania Railroad, which in the 1850s received permission to build its own telegraph line, having bought necessary patents.

Paul had the technical know-how to copy Edison's Kinetoscope when he realized the American inventor hadn't covered all the necessary patents, to make his own camera when Edison cut off the supply of films and produce a film projector, the Theatrograph, within two months of hearing about Lumière's invention.