HI

Hiroko Iwasaki

Ricoh Company: 33 patents #538 of 9,818Top 6%
Overall (All Time): #108,904 of 4,157,543Top 3%
33
Patents All Time

Issued Patents All Time

Showing 26–33 of 33 patents

Patent #TitleCo-InventorsDate
5620767 Light reflecting and heat dissipating material and optical information recording medium using the same Makoto Harigaya, Yukio Ide, Osamu Nonoyama, Yoshiyuki Kageyama 1997-04-15
5298305 Phase-change type information recording medium Michiaki Shinozuka, Makoto Harigaya, Yukio Ide, Yoshiyuki Kageyama 1994-03-29
5156693 Information recording medium Yukio Ide, Makoto Harigaya, Yoshiyuki Kageyma 1992-10-20
5100700 Information recording medium Yukio Ide, Makoto Harigaya, Katsuyuki Yamada 1992-03-31
5095479 Optical information recording medium Makoto Harigaya, Yukio Ide, Yoshiyuki Kageyama 1992-03-10
5080947 Information recording medium Katsuyuki Yamada, Narihito Kojima, Yukio Ide, Makoto Harigaya 1992-01-14
5024927 Information recording medium Katsuyuki Yamada, Yukio Ide, Makoto Harigaya 1991-06-18
5011723 Optical information recording medium Makoto Harigaya, Yukio Ide, Katsuyuki Yamada 1991-04-30