Patents by Inventor Manfred Elzenbeck

Manfred Elzenbeck has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Chair having a vertically adjustable headrest
    Patent number: 3979150
    Abstract: A chair has a backrest and a headrest which is supported by two struts which are longitudinally slidable and also rotatable in apertures of guide members provided in the backrest and in the headrest. The struts have transverse grooves which are engageable by detents in the guide members to hold the struts and hence the headrest in position. The struts are rotatable to disengage the detents from the grooves in the struts. The struts are thus removable both from the backrest and from the headrest. A transverse rod extending between the struts releasably holds them in angular position for engagement of the detents in the grooves.
    Type: Grant
    Filed: April 15, 1975
    Date of Patent: September 7, 1976
    Assignee: August Froscher K.G.
    Inventor: Manfred Elzenbeck