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Inventor

Lester A. Amtsberg

Inventor
Utica, NY, US

Overview

4→
Patents
1976–1979
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 4 as inventor

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

E21Bprimary
E21BEarth or rock drilling40%
B25DPercussive tools30%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests20%
F16DCouplings for transmitting rotation10%
PatentTitleYear
4,157,121'Hydraulic powered rock drill'19794,072,198'Hydraulic rock drill'19783,945,442'Hydraulic rock drill with stroke responsive advance'19763,939,670'Rotatable drill string having a torsionally elastic shaft driving connection with rock bit'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1979Patents assigned to CHICAGO PNEUMATIC TOOL CO (4)· patent assignee history
1976–1979Based in Utica, NY, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CHICAGO PNEUMATIC TOOL CO41976–1979
Locations
LocationPatentsSpan
Utica, New York, US41976–1979