How many patents does
Nippon Piston Ring Company have?
patents
483
families
149
granted
123
applications
360
JP
176
US
85
EP
67
CN
66
WO
43
KR
12
RoW
34
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The report contains ten-year analysis with the following sections
- patent filing analysis
- worldwide filing analysis
- patent family analysis
- application analysis
- granted analysis
- classification analysis
- citation analysis
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Nippon Piston Ring Company
Top ten assignees appearing on patents
2009 - 2018
Nippon Piston Ring Company
The top ten patent families are
|
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 |