Inventor

David Johnson

Inventor
Columbia, MD, US

Overview

9→
Patents
1977–2021
Patent span
Human necessities
Primary field (CPC A)

Patents· 9 as inventor

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

A61Kprimary
A61KPreparations for medical, dental or toiletry purposes33%
LOC1317%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations8%
B65GTransport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors8%
D06BTreating textile materials using liquids, gases or vapours8%
D06CFinishing, dressing, tentering or stretching textile fabrics8%
E21BEarth or rock drilling8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984Patents assigned to AMERICAN ARTOS CORP (1)· patent assignee history
1984Based in Charlotte, NC, US· patent location history
1998–1999Patents assigned to AMERICAN CYANAMID CO (2)· patent assignee history
1998–1999Based in Yardley, PA, US· patent location history
2020Patents assigned to JOHNSON DAVID (2)· patent assignee history
2020Patents assigned to SPIELBERG MAX (2)· patent assignee history
2020Based in Beverly Hills, CA, US· patent location history
2021Patents assigned to SMARTECH INC (2)· patent assignee history
2021Based in Columbia, MD, US· patent location history
2021Based in Conroe, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AMERICAN CYANAMID CO21998–1999
JOHNSON DAVIDself22020
SMARTECH INC22021
SPIELBERG MAX22020
AMERICAN ARTOS CORP11984
Locations
LocationPatentsSpan
Columbia, Maryland, US22021
Beverly Hills, California, US22020
Yardley, Pennsylvania, US21998–1999
Conroe, Texas, US12021
Charlotte, NC, US11984