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Inventor

Charles H. Etheridge

Inventor
Pittsburgh, PA, US

Overview

3→
Patents
1994–2000
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 3 as inventor

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

F04Bprimary
F04BPositive-displacement machines for liquids67%
G01NInvestigating or analysing materials by determining their chemical or physical properties33%
PatentTitleYear
6,092,992'System and method for pump control and fault detection'20005,370,004'Multiple port personal air sampling apparatus'19945,295,790'Flow-controlled sampling pump apparatus'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994Patents assigned to MINE SAFETY APPLIANCES CO (2)· patent assignee history
1994–2000Based in Pittsburgh, PA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MINE SAFETY APPLIANCES CO21994
Locations
LocationPatentsSpan
Pittsburgh, Pennsylvania, US31994–2000