Law of Patents

Chapter 6. Statutory Bars

  1. On-Sale Bar
    1. Developmental Stage of the Claimed Invention
      Pfaff v. Wells Electronics
      view pdfPfaff Patent No. 4,491,377
      Space Systems/Loral, Inc. v. Lockheed Martin, Corp.
      view pdfSpace Systems Patent No. 4,537,375
    2. What Constitutes an Offer of the Claimed Invention?
      Plumtree Software, Inc. v. Datamize LLC.
      view pdfDatamize Patent No. 6,646,040
      view pdfDatamize Patent No. 6,658,418
  2. Public-Use Bar
    Egbert v. Lippmann
    view pdfBarnes Patent No. 5,216
    Motionless Keyboard Co. v. Microsoft Corp.
    view pdfMKC Patent No. 5,332,322
    view pdfMKC Patent No. 5,178,477
  3. Comparative Perspective: “Prejudicial Disclosures” in Europe and Japan
  4. Experimental Use
    City of Elizabeth v. American Nicholson Pavement Co.
    view pdfNicholson Patent No. 11,491; Reissue Patent No. 1,583
    Electromotive Div. of General Motors Corp. v Transportation Sys. Div. of GM
    view pdfGM Patent No. 5,567,056
    view pdfGM Patent No. 5,169,242
    Lisle Corp. v. A.J. Mfg. Co.
    view pdfLisle Patent No. 5,287,776
  5. Third-Party Activity
    Lorenz v. Colgate-Palmolive-Peet Co.
    view pdfColgate Patent No. 1,918,603
    Evans Cooling Systems, Inc. v. General Motors Corp.
    view pdfEvans Patent No. 5,255,636
  6. Comparative Perspective: Third-Party Activity in Europe and Japan
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