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Inventor

QICHANG ZHENG

Inventor
CN

Overview

2→
Patents
2022–2025
Patent span
Human necessities
Primary field (CPC A)

Patents· 2 as inventor

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

A61Mprimary
A61MDevices for introducing media into, or onto, the body50%
F04DNon-positive-displacement pumps25%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications25%
PatentTitleYear
12,268,820Non-hysteretic oxygen supply respirator system202511,493,051Noise reduction method of a ventilator2022

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2022–2025Patents assigned to HUNAN VENTMED MEDICAL TECH CO LTD (2)· patent assignee history
2022–2025Based in CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HUNAN VENTMED MEDICAL TECH CO LTD22022–2025
Locations
LocationPatentsSpan
CN22022–2025