Inventor

Donald G. Zook

Inventor

Metamora, IL, US

Overview

5→

Patents

1976–1979

Patent span

Performing operations

Primary field (CPC B)

Patents· 5 as inventor

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

B29Dprimary

B29DProducing particular articles from plastics or from substances in a plastic state22%

F16FSprings22%

Y10TTechnical subjects covered by former us classification22%

B22CFoundry moulding11%

B29CShaping or joining of plastics11%

B66FHoisting, lifting, hauling or pushing, not otherwise provided for, e.g. devices which apply a lifting or pushing force directly to the surface of a load11%

PatentTitleYear

4,177,027'Core portion for a tube tire'1979 4,019,242'Vacuum pressure fill of viscous dampers'1977 3,998,918'Method of making a portion of an hollow, annular, sand-core'1976 3,987,990'Air cushion workpiece carrier'1976 3,939,880'Method of vacuum pressure fill of viscous dampers'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1979Patents assigned to CATERPILLAR TRACTOR CO (5)· patent assignee history

1976–1979Based in Metamora, IL, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CATERPILLAR TRACTOR CO	5	1976–1979

Locations

Location	Patents	Span
Metamora, Illinois, US	5	1976–1979