D Glossary of patent law terms

1 d

1.1 declaration of non-infringement
1.2 defensive patenting
1.3 defensive publication
1.4 defensive termination
1.5 demand letter
1.6 demand under chapter ii
1.7 dependent claim
1.8 design around
1.9 designated office
1.10 disclaimer
1.11 divided infringement
1.12 divisional patent application
1.13 doctrine of equivalents
1.14 double patenting
1.15 druckexemplar

d
declaration of non-infringement

a declaration obtained court 1 s actions not infringe particular patent. action declaration of non-infringement may brought before court preventive measure prior being sued patent proprietor, example if infringement suit believed imminent.

defensive patenting

a practice consisting in obtaining patents stake [one s] claim area of technology in hopes of preventing other companies suing them. see defensive patent aggregation.

defensive publication

a publication intended prevent grant of patent competitor placing information in public domain.

defensive termination

an implicit cross license licensor can terminate patent license if licensee turns around , sues licensor infringing patent.

demand letter

a letter sent company seeking royalties , threatening legal action patent infringement. called threat letter .

demand under chapter ii

a request subject international application international preliminary examination under chapter ii of patent cooperation treaty (pct).

dependent claim

a claim comprising features of claim.

design around

the act of developing alternative apparatus or method (which may in patentable invention), not infringe upon issued patent. used noun.

designated office

under patent cooperation treaty (pct), national patent office of or acting state designated applicant under chapter of pct. see chapter above.

disclaimer

in claim, words identifying subject-matter not claimed or, extension, amendment consisting in limiting claim introducing therein negative technical feature.

divided infringement

in u.s. patent law, form of patent infringement liability occurs when multiple actors involved in carrying out claimed infringement of method patent , no single accused infringer has performed of steps of method.

divisional patent application

a type of patent application contains matter previously-filed application. referred divisional application .

doctrine of equivalents

a legal rule allows court hold party liable patent infringement though infringing device or process not fall within literal scope of patent claim, nevertheless equivalent claimed invention.

double patenting

the protection of 1 single invention 2 patents owned same proprietor.

druckexemplar

at european patent office, application documents serving basis publication of granted patent.