Inventor · disambiguated record
Tetsuyuki Toyama
Also filed as: TOYAMA TETSUYUKI
3 granted patents·63 citations·filing 1993–2002
70Inventor score
Technology areasB41K
Top patents by PatentIndex Score
3 records- 0179US5577444AHand stampYAMAHACHI CHEMICAL CO LTD·Filed 1993·Granted Nov 26, 1996·55 cites·13 claims
- 0248US6659001B2Roller stamp of ink-exuding type and method for making the sameYAMAHACHI KEMIKARU KABUSHIKI K·Filed 2002·Granted Dec 9, 2003·5 cites·8 claims
- 0343US6840172B2Multiple-seal-faced stamp of liquid-exuding typeYAMAHACHI KEMIKARU KABUSHIKI K·Filed 2002·Granted Jan 11, 2005·3 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →