Inventor

Leonard J. Doolin

Inventor

Southbury, CT, US

Overview

11→

Patents

1989–2020

Patent span

Performing operations

Primary field (CPC B)

Patents· 11 as inventor

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

B64Cprimary

B64CAeroplanes36%

Y10TTechnical subjects covered by former us classification24%

B29CShaping or joining of plastics8%

F16CShafts8%

B05BSpraying apparatus4%

B29BPreparation or pretreatment of the material to be shaped4%

B29DProducing particular articles from plastics or from substances in a plastic state4%

B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts4%

B29LIndexing scheme associated with subclass b29c, relating to particular articles4%

F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g4%

PatentTitleYear

10,752,347Rotor blade pitch horn assembly2020 6,682,619'Composite pre-preg ply having tailored dielectrical properties and method of fabrication thereof'2004 5,913,659'Apparatus and method for adjusting rotor blade tracking'1999 5,431,540'Main rotor pitch control rod subassembly'1995 5,346,367'Advanced composite rotor blade'1994 5,263,821'Mid-beam jointed reconfigurable bearingless main rotor assembly'1993 5,209,429'Helicopter with retractable rotor for transport'1993 5,174,677'Main rotor pitch control rod assembly with passive locking feature'1992 5,074,494'Elastomeric swashplate configuration for helicopters'1991 5,067,875'Composite scissors for a swashplate'1991 4,818,179'Composite helicopter rotor hub'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1999Patents assigned to UNITED TECHNOLOGIES CORP (8)· patent assignee history

1989–2020Based in Southbury, CT, US· patent location history

1992Patents assigned to US DEPARTMENT OF THE ARMY (1)· patent assignee history

1994Based in Milford, CT, US· patent location history

2004–2020Patents assigned to SIKORSKY AIRCRAFT CORP (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
UNITED TECHNOLOGIES CORP	8	1989–1999
SIKORSKY AIRCRAFT CORP	2	2004–2020
US DEPARTMENT OF THE ARMY	1	1992

Locations

Location	Patents	Span
Southbury, CT, US	10	1989–2020
Milford, CT, US	1	1994