Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Mechanical acoustic filter with adjustable high-frequency cut-off

Mechanical acoustic filter with adjustable high-frequency cut-off

US Patent 6438227 · Granted Aug 20, 2002

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method to securely update over-the-air firmware2024