4.
    发明专利
    未知

    公开(公告)号:AT117125B

    公开(公告)日:1930-04-10

    申请号:AT117125D

    申请日:1929-03-30

    Applicant: KUEHN ALFRED

    Inventor: KUEHN ALFRED

    5.
    发明专利
    未知

    公开(公告)号:AT95717B

    公开(公告)日:1924-01-25

    申请号:AT95717D

    申请日:1922-04-05

    Applicant: KUEHN ALFRED

    Inventor: KUEHN ALFRED

    A New or Improved Ruler
    7.
    发明专利

    公开(公告)号:GB190124788A

    公开(公告)日:1902-01-09

    申请号:GB190124788D

    申请日:1901-12-05

    Applicant: KUEHN ALFRED

    Inventor: KUEHN ALFRED

    Abstract: 24,788. K³hn, A. Dec. 5. Rulers.-To facilitate the use of a ruler, a handle a is glued or secured to it.

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