The company says the alleged infringement covers nearly all its equipment.
Doosan Bobcat described the legal action as a measure to protect its innovations.
The tunnel aimed to replace century-old New Jersey-Manhattan rail links.
Summa’s tender was scrapped nearly a year later—despite securing funding.
The project has been a source of pain for the NSSF since 2011.
I&M Bank had on Monday advertised for auction 204 houses at the 390-unit estate.