![]() ![]() Publication of US20100281809A1 publication Critical patent/US20100281809A1/en Assigned to KEYSTONE RETAINING WALL SYSTEMS LLC reassignment KEYSTONE RETAINING WALL SYSTEMS LLC CERTIFICATE OF CONVERSION Assignors: KEYSTONE RETAINING WALL SYSTEMS, INC. First worldwide family litigation filed litigation Critical (B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License. Assignors: DAWSON, WILLIAM B., MACDONALD, ROBERT A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). reassignment KEYSTONE RETAINING WALL SYSTEMS, INC. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Family has litigation Priority to US29/186,712 priority Critical patent/USD501935S1/en Priority to US10/754,454 priority patent/US7780141B2/en Application filed by Keystone Retaining Wall Systems LLC filed Critical Keystone Retaining Wall Systems LLC Priority to US12/839,028 priority patent/US8132988B2/en Assigned to KEYSTONE RETAINING WALL SYSTEMS, INC. Original Assignee Keystone Retaining Wall Systems LLC Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ![]() ![]() MacDonald Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US12/839,028 Other versions US20100281809A1 Google Patents US8132988B2 - Retaining wall blockĭownload PDF Info Publication number US8132988B2 US8132988B2 US12/839,028 US83902810A US8132988B2 US 8132988 B2 US8132988 B2 US 8132988B2 US 83902810 A US83902810 A US 83902810A US 8132988 B2 US8132988 B2 US 8132988B2 Authority US United States Prior art keywords block blocks legs mold wall Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. ![]()
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