Philip Barnhart Zeigler

Fluessigkeitshilfskraftlenkung for motor vehicles

Philip Barnhart Zeigler, William Blair Thompson, 1958 .

Power steering for motor vehicles

William B. Thompson, Philip Barnhart Zeigler, Robert P. Rohde, 1964 .

Adjustable steering column for motor vehicles

Philip Barnhart Zeigler, Robert Derry Wight, 1963 .