Lawrence E. Long — 4 Patents at Dyckerhoff & Widmann

Lawrence E. Long has been granted 4 US patents while listed as an inventor at Dyckerhoff & Widmann. The first was granted in 1993 and the most recent in November 2025. Lawrence E. Long ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Lawrence E. Long in Avon Lake, OH, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
12458579	Cannabis-based products and methods	—	2025-11-04
5913641	Tensionable cable truss support system	—	1999-06-22
5238329	Mine roof support system	Klaus M. Langeneckert, Gero Herrmann	1993-08-24
5193940	Mine roof support system	—	1993-03-16

Lawrence E. Long — 4 Patents

Issued Patents All Time

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