Bird Feeder
- 专利权人:
- Thomas VAN DYK
- 发明人:
- Thomas VAN DYK
- 申请号：
- US13550670
- 公开号：
- US20130061810A1
- 申请日:
- 2012.07.17
- 申请国别(地区):
- US
- 年份:
- 2013
- 代理人:
- 摘要：
- A bird feeder includes a fine-mesh inner container positioned in a course-mesh outer container. One or more features within the inner container urge the inner container outwardly against the outer container.
- 来源网站：
- 中国工程科技知识中心
