Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Operator interchangeable gear driven platen and platen drive mechanism for typewriters and printers

Operator interchangeable gear driven platen and platen drive mechanism for typewriters and printers

US Patent 4347009 · Granted Aug 31, 1982

Estimated economic value: $20,205,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

System and method for automatic diagnosis of impairments in a digital quadrature2011
Motorized directionally steerable trailer tongue jack2004
Process of extracting a metal value1984