Inventor
KATORI MASAYA
JP5 patents
Patents
5 patentsUS6180048B1Jan 30, 2001
Manufacturing method of color keypad for a contact of character illumination rubber switch
POLYMATECH CO LTD70 citations93
US7262379B2Aug 28, 2007
Key sheets and method of producing the same
POLYMATECH CO LTD24 citations91
US6382855B1May 7, 2002
Key sheet and method for manufacturing the same
POLYMATECH CO LTD11 citations70
US7737375B2Jun 15, 2010
Key sheet
POLYMATECH CO LTD6 citations59
US6607812B2Aug 19, 2003
Key sheet
POLYMATECH CO LTD3 citations59