E01B 3/34

Technology

Patent/Pub #	Title	Filing Date	Issue/Publication Date	Patent Owner
9890503	High strength, integrally pre-stressed monoblock concrete crosstie with optimal geometry for use in ballasted railways	Sep 23, 14	Feb 13, 18	GUTANNA INNOVATIVE CONCRETE AND TECHNOLOGIES, LLC
9238891	High strength, integrally pre-stressed monoblock concrete crosstie with optimal geometry for use in ballasted railways	Feb 20, 15	Jan 19, 16	GUTANNA INNOVATIVE CONCRETE AND TECHNOLOGIES, LLC
8875411	Cylindrical ruler	Sep 11, 12	Nov 04, 14	Not available
5135164	Prestressed concrete railroad tie	Sep 07, 90	Aug 04, 92	DYCKERHOFF & WIDMANN AKTIENGESELLSCHAFT
4773840	Manufacture of pre-stressed concrete railroad ties	Oct 21, 87	Sep 27, 88	Not available

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Number of patents in all portfolios	100 (maximum)	1000 (maximum)	2000 (maximum)	Unlimited
Follows in all categories (Watch)	10 (maximum)	50 (maximum)	500 (maximum)	Unlimited
Maximum number of portfolios	5 (maximum)	10 (maximum)	100 (maximum)	Unlimited
Maximum number of comparisons	1 (maximum)	5 (maximum)	20 (maximum)	Unlimited

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Monthly PAIR Information and Watches
Number of patents in all portfolios	100 (maximum)	1000 (maximum)	2000 (maximum)	Unlimited
Watches in all categories (Watch)	10 (maximum)	50 (maximum)	500 (maximum)	Unlimited
Maximum number of portfolios	5 (maximum)	10 (maximum)	100 (maximum)	Unlimited
Maximum number of comparisons	1 (maximum)	5 (maximum)	20 (maximum)	Unlimited

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Number of patents in all portfolios	100 (maximum)	1000 (maximum)	2000 (maximum)	Unlimited
Follows in all categories (Watch)	10 (maximum)	50 (maximum)	500 (maximum)	Unlimited
Maximum number of portfolios	5 (maximum)	10 (maximum)	100 (maximum)	Unlimited
Maximum number of comparisons	1 (maximum)	5 (maximum)	20 (maximum)	Unlimited