ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,420, issued on May 20.
"Seismic retrofit system" was invented by Vassil Dimitrov (Seattle).
According to the abstract* released by the U.S. Patent & Trademark Office: "A seismic washer and a seismic retrofit system including a seismic washer are provided. The seismic washer includes a fastener comprising a first opening and a washer fixedly attached to and extending from the fastener. The washer includes a second opening provided perpendicular to the first opening. The second opening is configured to receive a bolt that couples the washer to a structural building component. The seismic retrofit system includes the seismic washer and a seismic tie bracket comprising a first arm an...