Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Portable electronic device powered by proton exchange membrane fuel cell

Portable electronic device powered by proton exchange membrane fuel cell

US Patent 6447945 · Granted Sep 10, 2002

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Water electrolyzer and system2005
Water electrolyzer and system2005
Multiple cell thermionic converter having apertured tubular intercell connectors2001
Air data sensing probe with chromium surface treatment2000
Refractory heat transfer module2000
Thermionic converter and method of making same2000
Hermetic ceramic composite structures1997
Adjustable seal assembly1997
Chromium surface treatment of nickel-based substrates1996
Braze for silicon carbide bodies1995
Method of fabrication of composites1994
Preparing refractory fiberreinforced ceramic composites1994