Automatic opening and closing knife

Automatic spring retractable utility knife

Automatic spring retractable utility knife

Automatically retractable safety utility knife

Automatically retractable utility knife

Autoretracting box-cutting knife

Auxiliary slitting blade for a cutting instrument

Belt buckle and knife

Belt buckle knife

Bi-fold knife with locking and release mechanisms

Biased pocket knife scissors

Blade lock for folding knife

Blade lock mechanism for folding knife

Blade locking mechanism

Blade opening scabbard for folding knife

Blade pushing device of cutting knives

Blade scraper

Blade support device for a knife

Blade-assisting mechanism for a folding knife

Blade-assisting mechanism for a folding knife