Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Accessory locking device for a doorknob having a keyhole therein

Accessory locking device for a doorknob having a keyhole therein

US Patent 4631938 · Granted Dec 30, 1986

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Extended cab pickup storage tray1998
Electroluminescent device1997
Electroluminescent device1996
Electroluminescent devices containing a conjugated polymer obtained via halogen 1996
Door opening system and method1994
Isolation structure for contamination sensitive items1993
Combined cover and attaching means for concealing a deadbolt lock1989
Stabilized polysilylenes and imaging members therewith1988
Optical recording member1987
Infrared sensitive phthalocyanine compositions1985
Ablative infrared sensitive devices containing soluble naphthalocyanine dyes1985
Optical recording member1981