SY

Sadao Yoshinaga

YL Yoshinaga Prince Company Limited: 12 patents #1 of 3Top 35%
PC Prince Industrial Development Company: 10 patents #1 of 3Top 35%
DC Dainihon Jochugiku Co.: 1 patents #13 of 34Top 40%
Overall (All Time): #166,058 of 4,157,543Top 4%
25
Patents All Time

Issued Patents All Time

Showing 1–25 of 25 patents

Patent #TitleCo-InventorsDate
5083881 Writing tool including openable decorative article at shaft end 1992-01-28
5071342 Burner device 1991-12-10
D319761 Gas burning tool 1991-09-10
4995171 Gas combustion type dryer Hiroyoshi Mashine 1991-02-26
D313041 Ball-point pen Suk Jun Kim, Atsushi Deguchi 1990-12-18
4938686 Burner device 1990-07-03
D308888 Ball-point pen Suk Jun Kim, Atsushi Deguchi 1990-06-26
D308226 Ball-point pen Suk Jun Kim, Atsushi Deguchi 1990-05-29
D306457 Ball-point pen Suk Jun Kim, Atsushi Deguchi 1990-03-06
D305910 Ball-point pen Suk Jun Kim, Atsushi Deguchi 1990-02-06
D305776 Ball-point pen Suk Jun Kim, Atsushi Deguchi 1990-01-30
D302098 Gas burner 1989-07-11
4804324 Burner Device 1989-02-14
D299000 Hand-held piezo electric torch 1988-12-20
D297269 Lighter 1988-08-16
D292029 Lighter 1987-09-22
4693868 Thermal fumigator for drugs Yoshio Katsuda, Hiroyoshi Mashine 1987-09-15
4643671 Burner device 1987-02-17
D284796 Lighter 1986-07-22
4597732 Burner device 1986-07-01
4502465 Catalyst combustion curling device Yoshinobu Tajiri, Hiroyoshi Mashine 1985-03-05
D264257 Cigarette lighter 1982-05-04
4288209 Gas cigarette lighter with solar cell 1981-09-08
4209977 Lighter with a watch 1980-07-01
D254873 Cigarette lighter 1980-04-29