Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Position-monitoring device for persons in a tunnel system

Position-monitoring device for persons in a tunnel system

US Patent 8618931 · Granted Dec 31, 2013

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Mobile satellite communication gateway and method for establishing a satellite c2021
Access control device2014
Rail-guided transport system2009