Patents Assigned to Atkinson McDougal Corporation
  • Permeable breakwater
    Patent number: 5224794
    Abstract: A permeable breakwater for submerged offshore or seawall retentive installation includes a base and permeable opposed sides terminating at an upwardly projecting permeable wave wall. The breakwater is located offshore to cause moderate to heavy waves to break further offshore thereby dissipating their energy before reaching the beach.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: July 6, 1993
    Assignee: Atkinson-McDougal Corporation
    Inventors: Francis S. Atkinson, William G. McDougal
  • Erosion protection device
    Patent number: 5190403
    Abstract: An erosion protection device is provided to control erosion in environments prone to water induced erosion. Each individual device includes a central core area, and six generally equally sized legs projecting outward from the core at equal spacing in each direction. Spacers are provided at the interface of the legs and core. Multiple devices are group together to form a protective nested group to form a protective cover.
    Type: Grant
    Filed: June 7, 1991
    Date of Patent: March 2, 1993
    Assignee: Atkinson-McDougal Corporation
    Inventor: Francis S. Atkinson
  • Permeable breakwater
    Patent number: 5174681
    Abstract: A permeable breakwater for submerged offshore or seawall retentive installation includes a base and permeable opposed sides terminating at an upwardly projecting permeable wave wall. The breakwater is located offshore to cause moderate to heavy waves to break further offshore thereby dissipating their energy before reaching the beach.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: December 29, 1992
    Assignee: Atkinson McDougal Corporation
    Inventors: Francis S. Atkinson, William G. McDougal