Assignee
CON SPAN CULVERT SYSTEMS INC
US·4 granted patents·259 citations·filing 1986–1989
Technology mixE01F4
Top patents by PatentIndex Score
4 records- 0194US4993872APrecast concrete culvert systemCON SPAN CULVERT SYSTEMS INC·Filed 1989·Granted Feb 19, 1991·96 cites·22 claims
- 0289US4854775APrecast concrete culvert systemCON SPAN CULVERT SYSTEMS INC·Filed 1988·Granted Aug 8, 1989·60 cites·12 claims
- 0388US4797030APrecast concrete culvert systemCON SPAN CULVERT SYSTEMS INC·Filed 1987·Granted Jan 10, 1989·59 cites·8 claims
- 0478US4687371APrecast concrete culvert sectionCON SPAN CULVERT SYSTEMS INC·Filed 1986·Granted Aug 18, 1987·44 cites·12 claims
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