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Inventor

John L. Butler

Inventor
Cohasset, MA, US

Overview

26→
Patents
1976–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 26 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers31%
B06BMethods or apparatus for generating or transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency, e.g. for performing mechanical work in general20%
G10KSound-producing devices16%
H02NElectric machines not otherwise provided for7%
H10NElectric solid-state devices not otherwise provided for7%
G01SRadio direction-finding5%
G01VGeophysics4%
H01LSemiconductor devices4%
H04KSecret communication2%
H04NPictorial communication, e.g. television2%
PatentTitleYear
10,744,532End driven bender transduction apparatus20209,036,029'Active cloaking with wideband transducers'20158,836,792'Active cloaking with transducers'20148,659,211'Quad and dual cantilever transduction apparatus'20148,599,648'Doubly steered acoustic array'20138,552,625'Cantilever type acoustic transduction apparatus'20138,072,843'Stepped multiply resonant wideband transducer apparatus'20117,692,363'Mass loaded dipole transduction apparatus'20107,453,186'Cantilever driven transduction apparatus'20087,372,776'Modal acoustic array transduction apparatus'20087,292,503'Multi piston electro-mechanical transduction apparatus'20076,950,373'Multiply resonant wideband transducer apparatus'20056,734,604'Multimode synthesized beam transduction apparatus'20046,654,316'Single-sided electro-mechanical transduction apparatus'20035,184,332'Multiport underwater sound transducer'19935,047,683'Hybrid transducer'19914,864,548'Flextensional transducer'19894,845,688'Electro-mechanical transduction apparatus'19894,754,441'Directional flextensional transducer'19884,742,499'Flextensional transducer'19884,642,802'Elimination of magnetic biasing using magnetostrictive materials of opposite strain'19874,443,731'Hybrid piezoelectric and magnetostrictive acoustic wave transducer'19844,438,509'Transducer with tensioned-wire precompression'19844,332,986'Speaker system employing passive radiator'19824,326,275'Directional transducer'19823,933,219'Speaker system'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976Patents assigned to AMBIENT INC (1)· patent assignee history
1976–1993Based in Marshfield, MA, US· patent location history
1982–2020Patents assigned to IMAGE ACOUSTICS INC (20)· patent assignee history
1984–2020Patents assigned to BUTLER JOHN L (7)· patent assignee history
1984–1987Patents assigned to RAYTHEON CO (2)· patent assignee history
2003–2020Based in Cohasset, MA, US· patent location history
2011–2020Patents assigned to BUTLER ALEXANDER L (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
IMAGE ACOUSTICS INC201982–2020
BUTLER JOHN Lself71984–2020
BUTLER ALEXANDER L42011–2020
RAYTHEON CO21984–1987
AMBIENT INC11976
Locations
LocationPatentsSpan
Cohasset, Massachusetts, US142003–2020
Marshfield, Massachusetts, US121976–1993