Inventor

CLAUSEN HERMAN A

US3 patents

Patents

3 patents

US4241777ADec 30, 1980

Portable shell

WENGER CORP55 citations94

US4238097ADec 9, 1980

Conductor's chair

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US4768617ASep 6, 1988

Adjustable stairway having retractable wheel carriage

WENGER CORP52 citations86