Combined motorcycle helmet and air filter

Design

USD348751S Combined motorcycle helmet and air filter 失效

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Patent Title: Combined motorcycle helmet and air filter
Application No.: US781285

Application Date: 1991-10-23
Publication No.: USD348751S

Publication Date: 1994-07-12
Designer: Martin J. Bosack
Applicant: Martin J. Bosack

Combined motorcycle helmet and air filter

Public/Granted literature

US4241661A Composite propellant with surface having improved strain capacity Public/Granted day:1980-12-30

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