Solicitação de exame técnico
#4.1
12/08/1987
RPI 894
Application data
Number
PI8406628Type
Filing
Publication
The letters patent expired on 07/08/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.
Talk to a specialistLatest action published by the INPI: 12/08/1987. We update with every new RPI gazette, published weekly.
Applicants
Hunting Oilfield Services, Inc
US
Tubular Corporation of America Inc.
US
Inventors
T. B. (pessoa física)
US
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