Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Frame for transparency film

Frame for transparency film

US Patent 4477991 · Granted Oct 23, 1984

Estimated economic value: $5,065,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Scanner with retractable roller feed1992
Theft-proof selectively positionable outdoor chair1985
Apparatus for mounting transparency film1984
Photographic film assemblage1981
Slide mounting apparatus1981
Movie lamp or similar article1980
Movie lamp or similar article1980