Advanced Hydraulics, Inc. v. Otis Elevator Company

How courts have described this case

Verbatim parenthetical descriptions written by other courts when citing this decision. Ranked by citation-network relevance.

• exchange of correspondence between plaintiff and defendants is critical element as far as plea of estoppel is concerned
• reliance on patentee’s misleading conduct found even though infringer had also informed patentee that infringer’s internal investigation had indicated that there was no infringement
• no estoppel where patentee informed defendant that it would await a ruling in another case before pursuing litigation
• detrimental reliance found when infringer continued to invest in and expanded allegedly infringing business during five-year delay
• expansion of business is evidence of detrimental reliance, prejudice
• death of crucial witness is prejudice

Source: CourtListener parenthetical corpus (CC0).