of series-parallel type

Introduced: January 2024

Last revised: January 2025

Full Title

Transmitting power from power plants to propellers or rotors; Arrangements of transmissions > specially adapted for specific power plants > for electric power plants > of hybrid-electric type > of series-parallel type

Classification Context

Section:: PERFORMING OPERATIONS; TRANSPORTING
Class:: AIRCRAFT; AVIATION; COSMONAUTICS
Subclass:: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT

Top Applicants

Top 10 applicants by patent filingsfor class B64, 2013–2023, worldwide · Source: EPO PATSTAT

BOEING COMPANY US 8,583
AIRBUS OPERATIONS DE 3,430
AIRBUS OPERATIONS FR 2,757
HAMILTON SUNDSTRAND US 2,332
SZ DJI TECHNOLOGY COMPANY CN 2,109
AIRBUS OPERATIONS GB 2,084
GOODRICH CORPORATION US 2,053
XI'AN AIRCRAFT DESIGN INSTITUTE OF AVIATION INDUSTRY CORPORATION OF CHINA 1,938
BOEING COMPANY 1,816
NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS 1,589