YU

Yoshio Udagawa

BL Blue Box Toy Factory Limited: 2 patents #6 of 21Top 30%
DC Dah Yang Toy Industrial Co.: 2 patents #3 of 11Top 30%
NS Nippon Steel: 1 patents #2,111 of 4,423Top 50%
Overall (All Time): #592,841 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
4821575 Ultrasonic flaw detecting method and apparatus Yoichi Fujikake, Takao Sugimoto, Kiyohide Tamaki 1989-04-18
D300644 Toy trackway 1989-04-11
4708685 Toys 1987-11-24
4678449 Trackway toy assembly 1987-07-07
D289666 Toy trackway or similar article Chie-Te Yang 1987-05-05
4609363 Track toy 1986-09-02
D284492 Toy trackway 1986-07-01
D281445 Elevating fireman toy 1985-11-19
D265751 Toy vehicle track 1982-08-10