presumption of validity - priority
- presumption of validity
- presumptive
- presumptive deviser of invention
- presumptively unlawful
- preterlegal
- pretext
- pretrial
- prevail
- prevailing party
- prevent
- prevention
- preventive
- preview
- previous
- previous application
- previous art
- previous cessation of patent
- previous cesser of patent
- previous exploitation of the invention
- previous filing
