Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Stethoscopic headphone set

Stethoscopic headphone set

US Patent 4277654 · Granted Jul 7, 1981

Estimated economic value: $348,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Electrical connection member for connecting a wire-shaped electrical conductor1992
Connector1990
Electric lamp1990