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Patent Searching and Data


Title:
Tool for making holes in the ground
Document Type and Number:
WIPO Patent Application WO1992010637
Kind Code:
A3
Inventors:
KELLNER WILLIBALD (AT)
VAN DALFSEN RUDOLF HENDRIK (NL)
Application Number:
EP9102394W
Publication Date:
December 10, 1992
Filing Date:
December 12, 1991
Export Citation:
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Assignee:
VAN DALFSEN ROTAR EQUIPMENT B.V.
KELLNER, WILLIBALD
VAN DALFSEN, RUDOLF, HENDRIK
International Classes:
B25D17/08; E02D5/38; E02D5/46; E02D7/10; E02D7/18; E02D27/42; E02F3/96; E21B7/26; E21B11/02; E21B19/087; (IPC1-7): E21B7/02; A21B11/02; A21B7/26; B25D17/08; B25D17/28; E02D5/46; E02D27/42
Foreign References:
US4193459A1980-03-18
US3685597A1972-08-22
US2122686A1938-07-05
DE216258C
FR1364218A1964-06-19
DE8912404U11989-12-14
FR2314309A11977-01-07
GB2064625A1981-06-17
US3797586A1974-03-19
US4458765A1984-07-10
US4130168A1978-12-19
US4148366A1979-04-10
US4697840A1987-10-06
US4810020A1989-03-07
DE2802871A11978-08-31
EP0372225A21990-06-13
BE351970A
US4588300A1986-05-13
GB2195682A1988-04-13
FR2211869A51974-07-19
EP0227576A21987-07-01
FR1230326A1960-09-15
CH141248A1930-07-31
Other References:
Patent Abstracts of Japan, vol. 9, no. 80 (M-370)(1803), 10 April 1985, & JP,A,59210124 (MITSUTOU KOGYO K.K.) 28 November 1984
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