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Inventor

Changfeng Liu

Inventor
Chongqing, CN

Overview

2→
Patents
2018–2019
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.

A61Bprimary
A61BDiagnosis50%
A61CDentistry25%
F41AFunctional features or details common to both smallarms and ordnance, e.g. cannons25%
PatentTitleYear
10,178,998Lateral grinding drill with continuously variable angle and driving component thereof20199,924,954'Handheld power machine for orthopaedic drill and saw and orthopaedic drill and saw power system with same'2018

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2018–2019Patents assigned to CHONGQING XISHAN SCIENCE & TECH CO LTD (2)· patent assignee history
2018–2019Based in Chongqing, CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CHONGQING XISHAN SCIENCE & TECH CO LTD22018–2019
Locations
LocationPatentsSpan
Chongqing, CN22018–2019