The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 1986
Filed:
Mar. 21, 1985
Applicant:
Inventor:
Mitsukatsu Nagashima, Tokyo, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
181129 ; 2209 ; 1791 / ;
Abstract
A headphone structure comprises a pair of headband arms, a pair of phone units having joint arms, a first joint member for pivotally connecting the pair of headband arms, and a pair of second joint members for pivotally connecting the pair of phone units through their joint arms to the pair of headband arms, respectively. The headband arms and the phone units are collapsible via the first joint member and the second joint members. Rotational paths of the second joint members are included in a single plane. On the other hand, a rotational path of the first joint member is perpendicular to the single plane.