Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Automatic focusing system for projectors

Automatic focusing system for projectors

US Patent 4198138 · Granted Apr 15, 1980

Estimated economic value: $354,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Single package containing multiple integrated circuit devices2005
Antenna indexing and retaining mechanism2001
Hinge assembly2000
Dual beam contact1999
Radiotelephone handset having a faceplate to accommodate a plurality of distinct1999
Portable radiotelephone1999
Communication device having interchangeable faceplates and active keypad cover1998
Portable radiotelephone device adapted to receive a variety of other portable de1998
Faceplate having a keypad cover for a portable telephone1998
Faceplate for a portable telephone1998
Faceplate having a keypad cover for a portable telephone1998
Retractable antenna1998