I'm doing some patent processing and was wondering if there's a master database somewhere (Bloomberg, D&B?) which uniquely identifies companies that I could map patent owners/assignees into. The company names in the filings aren't always consistent, or may change name while keeping the same legal entity. I'd prefer not to generate my own name/alias lookup if something already exists.

I'd prefer something from public data sources, as it seems D&B has private identifiers. I'm looking into EDGAR, but I'm not sure that's comprehensive enough since it's based on voluntary SEC filings.

  • this is probably off-topic. Derwent clarivate.com/products/dwpi-reference-center has produced canonical names for patent owners and mapped patent documents to them. It is a proprietary database. They also have made their own abstracts.
    – George White
    Jun 19 '19 at 18:35
  • I haven't used it, but Google Patents has a searchable Public Data site: console.cloud.google.com/marketplace/details/…
    – Eric S
    Jun 19 '19 at 19:39
  • Possibly: sec.gov/rules/other/4-460list.htm
    – Eric S
    Jun 19 '19 at 19:40
  • It's not uncommon for companies to wait intentionally and file assignee information later in the prosecution of a pending application, as a way to avoid tipping their hand. You'll have more success with granted patents than with applications, but it's still going to be tough depending on the company.
    – jdpatent
    Jun 22 '19 at 15:08

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