This inventor holds 1 USPTO granted patent. Top assignee: Makita Corporation. Active years: 2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2026
Title: Shizuki Okajima: Power Tool Inventor
Introduction
Shizuki Okajima is an inventor based in Anjo, Japan, and is associated with Makita Corporation. His patent work includes an invention concerning a power tool with a multi-stage speed-reducing mechanism.
Latest Patents
Okajima is credited with 1 patent. His patent, “Power tool,” describes a tool with a motor, an output part positioned forward of the motor, and a speed-reducing mechanism that transmits rotational energy from the motor’s rotor to the output part. The mechanism provides three or more variable-speed stages, selected using a movable gear-shifting manipulation part.
The invention also includes a position-holding part that helps keep the gear-shifting manipulation part at each speed position. Its holding force is greater at an intermediate speed position than at either end position of the movable range.
Career Highlights
Okajima’s listed invention addresses the design of a power tool’s speed-selection mechanism. The patent describes how the gear-shifting control can be held securely at different settings, with particular emphasis on the intermediate speed position.
Collaborations
Okajima is associated with Makita Corporation. His listed coworker is Takao Kuroyanagi.
Conclusion
Shizuki Okajima’s patent documents a multi-stage power-tool speed mechanism designed to hold its gear-shifting control securely, including at an intermediate speed setting.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile