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expired-patent × 31patentability × 3
ownership × 3
expiration × 3
lapsed-patent × 3
patent-lifetime × 2
licensing × 2
maintenance × 2
reinstatement × 2
patent-infringement × 1
prior-art × 1
claims × 1
patent-applications × 1
international × 1
post-grant × 1
copyright × 1
priority × 1
design × 1
continuation × 1
validity × 1
fees × 1
intellectual-property × 1
inventor × 1
assignment × 1
public-domain × 1
