发明名称 |
Prefilters for Devices with Air Filter |
摘要 |
Prefilter improves efficiency of cleaning process by preventing clogging of filter with dirt or other particles. The polished surface allows easy removal of dirt with one shake. Prefilter extends life of filter.
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申请公布号 |
US2008236120(A1) |
申请公布日期 |
2008.10.02 |
申请号 |
US20070693704 |
申请日期 |
2007.03.29 |
申请人 |
LI JANET;SUN SHAOLI |
发明人 |
LI JANET;SUN SHAOLI |
分类号 |
B32B3/24;B01D50/00;B32B5/18 |
主分类号 |
B32B3/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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