Assignee
SPIRO AMERICA INC
US·10 granted patents·243 citations·filing 1984–1993
Top patents by PatentIndex Score
10 records- 0189US4706481AApparatus for cutting hollow pipeSPIRO AMERICA INC·Filed 1986·Granted Nov 17, 1987·57 cites·22 claims
- 0280US4823579AApparatus for cutting hollow pipesSPIRO AMERICA INC·Filed 1987·Granted Apr 25, 1989·31 cites·18 claims
- 0378US4924684AApparatus for forming and cutting spiral pipeSPIRO AMERICA INC·Filed 1989·Granted May 15, 1990·31 cites·4 claims
- 0466US4567742ARibbed spiral pipe producing machineSPIRO AMERICA INC·Filed 1984·Granted Feb 4, 1986·20 cites·15 claims
- 0564US5257521AApparatus and method for cutting spiral pipeSPIRO AMERICA INC·Filed 1992·Granted Nov 2, 1993·21 cites·25 claims
- 0664US4711110AApparatus for crimping pipeSPIRO AMERICA INC·Filed 1986·Granted Dec 8, 1987·16 cites·20 claims
- 0762US5421185AApparatus for cutting sheet material into curved segmentsSPIRO AMERICA INC·Filed 1993·Granted Jun 6, 1995·18 cites·25 claims
- 0858US5105639AApparatus for forming spiral pipeSPIRO AMERICA INC·Filed 1990·Granted Apr 21, 1992·17 cites·21 claims
- 0957US5193374AApparatus for cutting spiral pipeSPIRO AMERICA INC·Filed 1991·Granted Mar 16, 1993·18 cites·18 claims
- 1051US5020351AApparatus for flattening irregular circumferential surfaces in spirally formed pipeSPIRO AMERICA INC·Filed 1990·Granted Jun 4, 1991·14 cites·14 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →