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公开(公告)号：US2263178A
公开(公告)日：1941-11-18
申请号：US16891037
申请日：1937-10-14
Applicant: GEN MOTORS CORP
Inventor： LIGNIAN JEAN A , KOEHRING ROLAND P
IPC: F16J15/36
CPC classification number: F16J15/36
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公开(公告)号：US2198253A
公开(公告)日：1940-04-23
申请号：US8529736
申请日：1936-06-15
Applicant: GEN MOTORS CORP
Inventor： KOEHRING ROLAND P
IPC: B22F7/04
CPC classification number: B22F7/04 , Y10S205/917 , Y10T428/12063 , Y10T428/1216
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公开(公告)号：US2190237A
公开(公告)日：1940-02-13
申请号：US18241137
申请日：1937-12-30
Applicant: GEN MOTORS CORP
Inventor： KOEHRING ROLAND P
CPC classification number: B22F7/04 , C22C1/0475
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公开(公告)号：US2158461A
公开(公告)日：1939-05-16
申请号：US8143236
申请日：1936-05-23
Applicant: GEN MOTORS CORP
Inventor： KOEHRING ROLAND P , HILDABOLT JOHN M
IPC: B22F7/04
CPC classification number: B22F7/04
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公开(公告)号：US2064086A
公开(公告)日：1936-12-15
申请号：US66810433
申请日：1933-04-26
Applicant: GEN MOTORS CORP
Inventor： SHORT CHARLES R , KOEHRING ROLAND P
IPC: F16C33/28
CPC classification number: F16C33/28 , Y10S428/926 , Y10S428/935 , Y10S428/936 , Y10S428/939 , Y10T428/12472 , Y10T428/12646 , Y10T428/1291 , Y10T428/12924
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Patent Agency Ranking
公开(公告)号：US1992549A
公开(公告)日：1935-02-26
申请号：US43176830
申请日：1930-02-27
Applicant: GEN MOTORS CORP
Inventor： SHORT CHARLES R , KOEHRING ROLAND P
CPC classification number: C22C33/0271 , B22F1/025 , C23C10/34 , C23C10/36 , Y10T428/12181 , Y10T428/12799
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27.发明授权Addition of elemental sulfur to ferrous powder to prevent galling during the briquetting operation 失效在铁粉中添加元素硫以防止在压块操作期间发生磨损
公开(公告)号：US3132021A
公开(公告)日：1964-05-05
申请号：US969860
申请日：1960-02-19
Applicant: GEN MOTORS CORP
Inventor： KOEHRING ROLAND P
IPC: C22C33/02
CPC classification number: C22C33/0221
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公开(公告)号：US2945292A
公开(公告)日：1960-07-19
申请号：US77697858
申请日：1958-11-28
Applicant: GEN MOTORS CORP
Inventor： LUTHER JR WILLIAM A , KOEHRING ROLAND P
IPC: F16D69/02
CPC classification number: F16D69/027 , Y10T428/12139 , Y10T428/12951
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公开(公告)号：US2855296A
公开(公告)日：1958-10-07
申请号：US52907755
申请日：1955-08-17
Applicant: GEN MOTORS CORP
Inventor： KOEHRING ROLAND P
CPC classification number: C23C26/00 , B22F7/04 , Y10S428/941 , Y10T428/12063 , Y10T428/12139 , Y10T428/12146 , Y10T428/12937
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公开(公告)号：US2748634A
公开(公告)日：1956-06-05
申请号：US28155452
申请日：1952-04-10
Applicant: GEN MOTORS CORP
Inventor： KOEHRING ROLAND P , WILKENS CARL E
IPC: B21H7/00
CPC classification number: B21H7/00
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