Assignee

DIJKSTRA KEES

NL·1 granted patent·13 citations·filing 1986–1986

Technology mixH04R1

Top patents by PatentIndex Score

1 record

0135US4722517AMechanical spring having negative spring stiffness useful in an electroacoustic transducerDIJKSTRA KEES·Filed 1986·Granted Feb 2, 1988·13 cites·8 claims

Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →