Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Reexamination Certificate
2006-08-25
2010-12-14
Nguyen, Tuan D (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
C381S374000
Reexamination Certificate
active
07853035
ABSTRACT:
Disclosed herein is a pair of headphones that includes a head band having a pair of support arms and a pair of housings angularly movably mounted on the support arms, respectively, by pivots in confronting relation to each other. Each of the housings has a presser disposed therein near the pivot and projecting substantially perpendicularly to an outer surface of the housing, the presser having a head held against one of the support arms under resiliency, the head having a step engageable with the support arm for limiting angular movement of the housing with respect to the support arm.
REFERENCES:
patent: 1546567 (1925-07-01), Childress
patent: 3356797 (1967-12-01), Konzelmann et al.
patent: 3447160 (1969-06-01), Teder
patent: 4302635 (1981-11-01), Jacobsen et al.
patent: 7-306954 (1995-11-01), None
Fujiwara Keitaro
Tsunoda Naotaka
Nguyen Tuan D
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Sony Corporation
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