Assignee
GAKKEN CO LTD
JP·23 granted patents·370 citations·filing 1971–2003
Top patents by PatentIndex Score
23 records- 0181US5190287AJigsaw puzzle toy using blocksGAKKEN CO LTD·Filed 1991·Granted Mar 2, 1993·70 cites·11 claims
- 0278US4127785AMiniature motorGAKKEN CO LTD·Filed 1976·Granted Nov 28, 1978·29 cites·10 claims
- 0375US5045013AAir-cushion vehicle toyGAKKEN CO LTD·Filed 1990·Granted Sep 3, 1991·36 cites·7 claims
- 0469US4152614AMiniature electric motors and method for manufacturing rotors for the sameGAKKEN CO LTD·Filed 1976·Granted May 1, 1979·25 cites·3 claims
- 0567US5354224ABlock toy including a plurality of blocks that can be variously assembled to create different graphical images and including apertured blocks having engagement surfaces which extend from edges of the apertures into the blocksGAKKEN CO LTD·Filed 1993·Granted Oct 11, 1994·38 cites·22 claims
- 0665US4258477AMultiplication study deviceGAKKEN CO LTD·Filed 1979·Granted Mar 31, 1981·14 cites·6 claims
- 0762USD245369SAudio-visual sheet playerGAKKEN CO LTD·Filed 1975·Granted Aug 9, 1977·12 cites·1 claims
- 0859US4561184ASchool utensil and toy robotGAKKEN CO LTD·Filed 1983·Granted Dec 31, 1985·15 cites·15 claims
- 0955US4671779ARunning toyGAKKEN CO LTD·Filed 1985·Granted Jun 9, 1987·20 cites·8 claims
- 1055US4667962AChildren's block toyGAKKEN CO LTD·Filed 1985·Granted May 26, 1987·17 cites·5 claims
- 1154US4002408ASystem and device for overhead projectionGAKKEN CO LTD·Filed 1971·Granted Jan 11, 1977·20 cites·21 claims
- 1249US4121355ALearning deviceGAKKEN CO LTD·Filed 1977·Granted Oct 24, 1978·11 cites·13 claims
- 1346US4146303AStereo-viewer and stereo-sheet to be used for the sameGAKKEN CO LTD·Filed 1977·Granted Mar 27, 1979·9 cites·14 claims
- 1445US4674433ACorrect answer displaying device for arithmetic practicing unitGAKKEN CO LTD·Filed 1985·Granted Jun 23, 1987·19 cites·4 claims
- 1545US4222195ACombination of running toy and track along which toy runsGAKKEN CO LTD·Filed 1979·Granted Sep 16, 1980·9 cites·9 claims
- 1643USD261165SToy animal figureGAKKEN CO LTD·Filed 1979·Granted Oct 6, 1981·3 cites·1 claims
- 1740US4636050AReflection type overhead projectorGAKKEN CO LTD·Filed 1984·Granted Jan 13, 1987·4 cites·6 claims
- 1838US4273541AClock for educational purposesGAKKEN CO LTD·Filed 1980·Granted Jun 16, 1981·6 cites·19 claims
- 1935US4262432AStudy deviceGAKKEN CO LTD·Filed 1979·Granted Apr 21, 1981·5 cites·12 claims
- 2035US4020505AMagnetic sheet player with an adjustable inclined magnetic headGAKKEN CO LTD·Filed 1975·Granted Apr 26, 1977·4 cites·14 claims
- 2130US4091427AElectric control system for magnetic sheet recording and reproducing apparatus for audiovisual instructionGAKKEN CO LTD·Filed 1975·Granted May 23, 1978·4 cites·9 claims
- 2223US7299262B2Information providing support system and method, and program and server for use in the system and methodGAKKEN CO LTD·Filed 2003·Granted Nov 20, 2007·0 cites·13 claims
- 2310US4288813AApparatus for automatically engraving mimeographic stencil papersGAKKEN CO LTD·Filed 1979·Granted Sep 8, 1981·0 cites·4 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →