The report contains ten-year analysis with the following sections
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Title of patent family (most common patent title) |
Family members |
Filing year |
---|---|---|
highly heat conductive piston ring for internal combustion engine | 12 | 2013 |
piston ring | 11 | 2008 |
iron-base sintered alloy for valve sheet and valve sheet for internal combustion engine | 11 | 2008 |
combined oil ring | 10 | 2009 |
flaky graphite cast iron, and method for production thereof | 10 | 2007 |
oil ring for internal combustion engine | 10 | 2010 |
sliding member and method for producing same | 10 | 2013 |
piston ring | 9 | 2011 |
piston ring and manufacturing method therefor | 9 | 2014 |
hard carbon coating film | 9 | 2013 |