Inventor · disambiguated record
Shozo Ishiyama
Also filed as: ISHIYAMA SHOZO
13 granted patents·290 citations·filing 1979–1991
93Inventor score
Top patents by PatentIndex Score
13 records- 0190US4368381ANumeral adding toyGAKUSHU KENKYUSHA GAKKEN CO LT·Filed 1981·Granted Jan 11, 1983·73 cites·15 claims
- 0281US5190287AJigsaw puzzle toy using blocksGAKKEN CO LTD·Filed 1991·Granted Mar 2, 1993·70 cites·11 claims
- 0381US4449792ALarge-aperture single lens with aspherical surfacesKONISHIROKU PHOTO IND·Filed 1981·Granted May 22, 1984·38 cites·6 claims
- 0465US4258477AMultiplication study deviceGAKKEN CO LTD·Filed 1979·Granted Mar 31, 1981·14 cites·6 claims
- 0564US4437732AWide magnification-variable range zoom lens systemKONISHIROKU PHOTO IND·Filed 1981·Granted Mar 20, 1984·20 cites·5 claims
- 0662US4501475AZoom lensKONISHIROKU PHOTO IND·Filed 1982·Granted Feb 26, 1985·19 cites·9 claims
- 0755US4667962AChildren's block toyGAKKEN CO LTD·Filed 1985·Granted May 26, 1987·17 cites·5 claims
- 0851USD334728SPortable planter for growing small plantsKK GAKUSHU KENKYUSHA·Filed 1990·Granted Apr 13, 1993·10 cites·1 claims
- 0943USRE34455ELarge-aperture single lens with aspherical surfacesKONISHIROKU PHOTO IND·Filed 1988·Granted Nov 23, 1993·9 cites·9 claims
- 1038US4273541AClock for educational purposesGAKKEN CO LTD·Filed 1980·Granted Jun 16, 1981·6 cites·19 claims
- 1135US4830475AFocusing means for a zoom lens groupKONISHIROKU PHOTO IND·Filed 1987·Granted May 16, 1989·6 cites·12 claims
- 1234US4498741ACompact, wide magnification-variable zoom lens systemKONISHIROKU PHOTO IND·Filed 1982·Granted Feb 12, 1985·4 cites·20 claims
- 1333US4350416ACompact zoom lensKONISHIROKU PHOTO IND·Filed 1980·Granted Sep 21, 1982·4 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Shozo Ishiyama files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →