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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
TSENTRALNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNOEXPERIMENTALNY INSTITUT ORGANIZATSII MEKHANIZATSII I TEKHNICHESKOI POMOSCHI STROITELSTVU	USSR MOSCOW

International Classification(s)

• E21B:EARTH OR ROCK DRILLING

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Bobylev, Leonid M	ulitsa Petrozavodskaya, 15, korpus 2, kv. 229, Moscow, SU	4	28
Gerasimenko, Nikolai P	ulitsa Botevgradskaya, 63, kv. 54, Saransk, SU	1	5
Gokhman, Yakov A	ulitsa Gladkova, 14, kv. 49, Krasnoyarsk, SU	1	5
Klimov, Nikolai J	ulitsa Krylova, 29, kv. 49, Novosibirsk, SU	1	5
Kovalev, Alexandr S	ulitsa Kulakova, 12, korpus 1, kv. 10, Moscow, SU	1	5
Svirschevsky, Valentin K	ulitsa Derzhavina, 19, kv. 59, Novosibirsk, SU	2	10

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

Full Text

US Patent No: 5031707

Apparatus for making holes in soil

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