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INSPEC and COMPENDEX Guide: Patent Searching (1878-1970)

INSPEC covers physics, electrical engineering, electronics, communications, control engineering, computers and computing, robotics, and information technology. COMPENDEX comprehensively covers the broad subject areas of engineering and applied science.

In This Section

Use these links to learn about the COMPENDEX Expert Search function.

Patent Searching (1878-1970)

There are several options available in COMPENDEX to search patents. Enter your search term(s) followed by wn and the appropriate search abbreviation. This option allows you to search COMPENDEX for patents as follows:

  • Patent Number (PM)
    For example: 3427935 wn PM
  • Country of Application (PU)
    For example: Nigeria wn PU
  • Submission Date (PA)
    For example: 1963 wn PA
  • Issue Date (PI)
    For example: 1969 wn PI
Patent Search


For in-depth patent information (1963-present), use the Derwent Innovations Index at

Subject Guide