| US2033117A              (en)* | 1928-07-21 | 1936-03-10 | Galion Iron Works & Mfg Co | Mold-board elevating and lowering mechanism for road graders | 
| US1945209A              (en)* | 1930-04-01 | 1934-01-30 | Villard Marcel | Compensated universal joint | 
| US1988357A              (en)* | 1931-10-28 | 1935-01-15 | Hounsfield Leslie Haywood | Planimeter | 
| US3572136A              (en)* | 1969-03-17 | 1971-03-23 | Richard B Stanley | Linear actuator | 
| US4154219A              (en)* | 1977-03-11 | 1979-05-15 | E-Systems, Inc. | Prismatic solar reflector apparatus and method of solar tracking | 
| US4102326A              (en)* | 1977-09-28 | 1978-07-25 | Sommer Warren T | Central receiver solar collector using mechanically linked mirrors | 
| US4226506A              (en)* | 1978-04-10 | 1980-10-07 | Saint-Gobain Industries | Swiveling solar reflector with multiple reflecting elements supported by prefabricated cambered members | 
| US4252107A              (en)* | 1978-04-20 | 1981-02-24 | General Electric Company | Solar tracking concentrator | 
| US4202321A              (en)* | 1978-05-30 | 1980-05-13 | Volna William M | Solar tracking device | 
| US4172443A              (en)* | 1978-05-31 | 1979-10-30 | Sommer Warren T | Central receiver solar collector using analog coupling mirror control | 
| US4274712A              (en)* | 1979-01-24 | 1981-06-23 | Sener, Ingenieria Y Sistemas, S.A. | Solar radiation reflectors adapted to track the incident rays of the sun | 
| DE2943944C2              (de)* | 1979-10-31 | 1983-04-28 | Carl Hurth Maschinen- und Zahnradfabrik GmbH & Co, 8000 München | Antriebsvorrichtung zum unabhängigen Drehen eines Sonnenkollektors um zwei senkrecht zueinander stehende Achsen | 
| US4368962A              (en)* | 1980-03-13 | 1983-01-18 | Hultberg Donald E | Solar tracking apparatus and system | 
| US4456332A              (en)* | 1980-04-07 | 1984-06-26 | Atlantic Richfield Company | Method of forming structural heliostat | 
| US4466423A              (en)* | 1982-09-30 | 1984-08-21 | The United States Of America As Represented By The United States Department Of Energy | Rim-drive cable-aligned heliostat collector system | 
| US4890599A              (en)* | 1987-04-16 | 1990-01-02 | Eiden Glenn E | Solar panel mounting assembly | 
| US4832002A              (en)* | 1987-07-17 | 1989-05-23 | Oscar Medina | Unified heliostat array | 
| HU51370A              (es)* | 1988-01-22 | 1990-04-30 |  |  | 
| JPH0795135B2              (ja)* | 1988-02-02 | 1995-10-11 | 国立天文台長 | 鏡面能動支持装置 | 
| US4968355A              (en)* | 1989-04-14 | 1990-11-06 | Johnson Kenneth C | Two-axis tracking solar collector mechanism | 
| US4979494A              (en)* | 1989-09-29 | 1990-12-25 | Andersen John I | Method and apparatus for generating thermal energy | 
| US4995377A              (en)* | 1990-06-29 | 1991-02-26 | Eiden Glenn E | Dual axis solar collector assembly | 
| US5325844A              (en)* | 1992-02-11 | 1994-07-05 | Power Kinetics, Inc. | Lightweight, distributed force, two-axis tracking, solar radiation collector structures | 
| US5404868A              (en)* | 1992-03-31 | 1995-04-11 | Vedanta Society Of Western Washington | Apparatus using a balloon supported reflective surface for reflecting light from the sun | 
| US5980052A              (en)* | 1997-07-29 | 1999-11-09 | Thor; Leifur Hayden | Sun reflecting device | 
| JP2951297B2              (ja)* | 1997-10-15 | 1999-09-20 | 三鷹光器株式会社 | 太陽光集光システム | 
| JPH11150409A              (ja)* | 1997-11-17 | 1999-06-02 | Hitachi Ltd | アンテナ駆動装置 | 
| US6231197B1              (en)* | 2000-03-20 | 2001-05-15 | Mitaka Kohkico., Ltd. | Heliostat for sunlight collecting system | 
| US6662801B2              (en)* | 2001-10-02 | 2003-12-16 | Pinnacle West Capital Corporation | Celestial tracking apparatus and method of controlling wind stow therefor | 
| US6552257B1              (en)* | 2001-10-16 | 2003-04-22 | American Signal Company | Nonrotating pivotable solar panel | 
| JP3748062B2              (ja)* | 2002-01-24 | 2006-02-22 | 日本電気株式会社 | 誘導装置、及び、誘導方法 | 
| JP3701264B2              (ja)* | 2002-07-05 | 2005-09-28 | 三鷹光器株式会社 | 太陽光集光システム用のヘリオスタットおよびその制御方法 | 
| US20040112373A1              (en)* | 2002-12-09 | 2004-06-17 | Derek Djeu | Passive Solar Tracker for a Solar Concentrator | 
| PT1604407E              (pt)* | 2003-03-18 | 2009-07-29 | Sunpower Corp Systems | Unidade do colector com seguimento solar | 
| JP3784021B2              (ja)* | 2003-05-06 | 2006-06-07 | 三鷹光器株式会社 | 自律型ヘリオスタット | 
| US7905227B2              (en)* | 2004-03-30 | 2011-03-15 | Energy Innovations, Inc. | Self-ballasting solar collector | 
| US20050279953A1              (en)* | 2004-06-18 | 2005-12-22 | Leo Gerst | Heliostat alignment system | 
| US7858875B2              (en)* | 2005-09-29 | 2010-12-28 | Enfocus Engineering Corp. | Radiant energy conversion system | 
| US8381718B1              (en)* | 2006-10-20 | 2013-02-26 | Idealab | Actuator for controlling rotation about two axes using a single motor | 
| MY152353A              (en)* | 2007-12-12 | 2014-09-15 | Mark K Moser | Light source tracker | 
| US8426792B2              (en)* | 2008-10-27 | 2013-04-23 | Seektech, Inc. | Solar reflector apparatus with independently controlled bail-arms |