What’s new

August 2026

• patent · 10 Jul 1973 · added 2 months ago

  Composite lens for an optical communication system providing directly viewed real images

  A Fresnel type lens having a discontinuously sloping stepped surface surrounds a smaller lens of comparable focal length axially aligned therewith but having a continuously sloping...

• patent · 5 Nov 1974 · added 2 months ago

  Apparatus for solar distillation

  1. AN APPARATUS FOR THE DISTILLATION OF A LIQUID COMPRISING A SOLAR STILL HAVING IN COMBINATION ONE OR MORE DISTILLAND-RETAINING COMPONENTS, A COVER CAPABLE OF TRANSMITTING RADIANT...

• patent · 17 Oct 1950 · added 2 months ago

  Plastic lens

  Machine transcription of the US2525921 patent scan, 3 pages.

• patent · 18 Apr 1967 · added 2 months ago

  Process and apparatus for solar distillation

  Machine transcription of the US3314862 patent scan, 19 pages.

• patent · 23 Mar 1948 · added 2 months ago

  Headlight and supporting means therefor

  Machine transcription of the US2438196 patent scan, 3 pages.

• patent · 4 Sep 1928 · added 2 months ago

  Solar heating apparatus

  Machine transcription of the US1683266 patent scan, 3 pages.

• patent · 6 Sep 1921 · added 2 months ago

  Stepped lenticular system for heat and light concentrating to be used on flying-machines

  Machine transcription of the US1390258 patent scan, 4 pages.

• patent · 5 Mar 1929 · added 2 months ago

  op chicago

  Machine transcription of the US1704173 patent scan, 5 pages.

• patent · 25 Nov 2010 · added 2 months ago

  Light concentrator, redirector and distributor

• patent · 15 Jan 2013 · added 2 months ago

  Self-contained solar heater and storage device

• patent · 29 Sep 1987 · added 2 months ago

  Solar heated canteen

  Machine transcription of the US4696284A patent scan, 5 pages.

• patent · 10 Jun 1986 · added 2 months ago

  Solar illumination device

  Machine transcription of the US4593976A patent scan, 14 pages.

• patent · 31 Dec 2011 · added 2 months ago

  Solar power plant

• patent · 30 Sep 2010 · added 2 months ago

  Solar-based power generator

• patent · 15 Apr 2010 · added 2 months ago

  Sunlight thermal converting device

• patent · 15 Apr 2010 · added 2 months ago

  Solar heat converter

• patent · 19 Feb 2008 · added 2 months ago

  Solar collector

• patent · 4 Oct 2007 · added 2 months ago

  Self-contained solar heater and storage device

• patent · 16 Jun 2005 · added 2 months ago

  Cover for covering energy collector in power plant, has reflecting inner surface formed on transparent outer surface of energy collector, where cover is made of anisotropic material

• patent · 28 Oct 1993 · added 2 months ago

  Faceted totally internally reflecting lens with curved faces

• patent · 20 Jul 1993 · added 2 months ago

  Solar powered lamp having a cover containing a fresnel lens structure

• patent · 30 Apr 1991 · added 2 months ago

  Solar energy intensifier and collector system

• patent · 16 Jan 1990 · added 2 months ago

  Radiant energy collector

• patent · 18 Jul 1989 · added 2 months ago

  Refracting solar energy concentrator and thin flexible Fresnel lens

• patent · 11 May 1982 · added 2 months ago

  Passive solar lighting system

  Machine transcription of the US4329021A patent scan, 9 pages.

• patent · 15 Sep 1981 · added 2 months ago

  Solar collector

  Machine transcription of the US4289119A patent scan, 6 pages.

• patent · 3 Nov 2020 · added 2 months ago

  Integral collector storage solar water heater

• patent · 3 Jun 2014 · added 2 months ago

  Solar-based power generator

• patent · 16 Oct 2018 · added 2 months ago

  Solar energy collector apparatus

• patent · 7 Sep 2021 · added 2 months ago

  Curved surface absorber type solar fluid heater