Invention Grant
- Patent Title: Earplug with tip cavity and methods of manufacturing the same
- Patent Title (中): 具有尖端腔的耳塞及其制造方法
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Application No.: US13768214Application Date: 2013-02-15
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Publication No.: US09549855B2Publication Date: 2017-01-24
- Inventor: Jeffrey L. Hamer , Kenneth F. Teeters , Ravi Thomas
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: US MN St. Paul
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: US MN St. Paul
- Main IPC: A61F11/08
- IPC: A61F11/08
Abstract:
Hearing protection devices, e.g., push-to-fit earplugs, having a tip cavity in the sound attenuating body and methods of manufacturing the hearing protection devices are described herein.
Public/Granted literature
- US20140230830A1 EARPLUG WITH TIP CAVITY AND METHODS OF MANUFACTURING THE SAME Public/Granted day:2014-08-21
Information query
IPC分类:
