U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"

David Sarnoff, American radio pioneer ; 1921

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

Class 400/448 - Roller bearing or ball bearing for type-bar

Subclass of Class 400 - Typewriting machines
Definition: Subject matter wherein significance is attributed to the
No. of patents: 0