| 申请人 |
MARTIN MARIETTA CORP., BETHESDA, MD., US |
发明人 |
PICKENS, JOSEPH, ROBERT, BELTSVILLE, MD 20705, US;LANGAN, TIMOTHY, JAMES, BALTIMORE, MD 21228, US;HEUBAUM, FRANK, HERBERT, BALTIMORE, MD 21228, US;KRAMER, LAWRENCE, STEVENSON, BALTIMORE, MD 21230, US;CHO, ALEX, RICHMOND, VA 23233, US |
