Patents by Inventor Robert P. Spring

Robert P. Spring 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).

  • Patent number: 4544182
    Abstract: The present invention relates to the field of office file labeling and discloses a label which is less expensive to manufacture and to apply to a normal numeric filing system. The label employs a color-coding system and includes perforations which permit unwanted portions of the label to be removed prior to application. The label is for numeric end-tab filing and is reversible about its central fold-line. Individual digits are rotated 180 degrees with respect to corresponding digits on the opposite side of the fold-line so that the digits are in readable orientation in either the reversed or non-reversed condition.
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: October 1, 1985
    Inventor: Robert P. Spring