The following are utility models for buckles—products manufactured by my family’s metalworking business—which I helped file while I was a university student. No maintenance fees (annuities) have been paid for them. I am not certain of their current status, but I believe these designs are now free for third parties to use.
The following are patents I filed—without the assistance of a patent attorney—based on research conducted with Mr. Hirata, Mr. Suzuki, and others during my time at this company. I vaguely recall struggling to create the technical drawings required for the patent applications.
I have written this page to ensure that my father’s utility models do not fade into obscurity, and, incidentally, to keep a record of my own patents.
Written by Taiji Yamada <taiji@aihara.co.jp>