Inventor

Earl R. Geddes

Inventor

Livonia, MI, US

Overview

1991–2010

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 20 as inventor

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

F01Nprimary

F01NGas-flow silencers or exhaust apparatus for machines or engines in general29%

H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers29%

G10KSound-producing devices24%

F02BInternal-combustion piston engines5%

Y02TClimate change mitigation technologies related to transportation5%

F16FSprings3%

H03GControl of amplification3%

H04SStereophonic systems3%

PatentTitleYear

7,708,112'Waveguide phase plug'2010 7,095,868'Phase plug with optimum aperture shapes'2006 7,068,805'Acoustic waveguide for controlled sound radiation'2006 6,782,112'Low frequency transducer enclosure'2004 6,269,318'Method for determining transducer linear operational parameters'2001 5,469,510'Arbitration adjustment for acoustic reproduction systems'1995 5,455,396'Temperature/environment-resistant transducer suspension'1995 5,432,857'Dual bandpass secondary source'1995 5,420,929'Signal processor for sound image enhancement'1995 5,343,533'Transducer flux optimization'1994 5,323,466'Tandem transducer magnet structure'1994 5,319,165'Dual bandpass secondary source'1994 5,313,407'Integrated active vibration cancellation and machine diagnostic system'1994 5,233,137'Protective anc loudspeaker membrane'1993 5,229,556'Internal ported band pass enclosure for sound cancellation'1993 5,210,805'Transducer flux optimization'1993 5,119,902'Active muffler transducer arrangement'1992 5,063,598'Active noise control system with two stage conditioning'1991 5,060,271'Active muffler with dynamic tuning'1991 5,048,470'Electronically tuned intake manifold'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1995Patents assigned to FORD MOTOR CO (15)· patent assignee history

1991–1995Based in Livonia, MI, US· patent location history

1995Patents assigned to JBL INC (1)· patent assignee history

2001Based in Itasca, IL, US· patent location history

2004–2010Based in Northville, MI, US· patent location history

2006–2010Patents assigned to GEDDES EARL RUSSELL (2)· patent assignee history

2006Patents assigned to GEDDES EARL (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FORD MOTOR CO	15	1991–1995
GEDDES EARL RUSSELLself	2	2006–2010
GEDDES EARLself	1	2006
JBL INC	1	1995

Locations

Location	Patents	Span
Livonia, MI, US	15	1991–1995
Northville, MI, US	4	2004–2010
Itasca, Illinois, US	1	2001