436 EXPLORATION GEOPHYSICS 



2,322,615 Issued June 22, 1943. F. G. Boucher. "Leveling Device." 

 2,322,681 Issued June 22, 1943. H. M. Zenor. "Condenser Gravity Meter." 

 2,325,005 Issued July 20, 1943. D. H. Clewell. "Gravity Meter." 

 2,327,692 Issued Aug. 24, 1943. L. L. Antes. "Gravity Meter." 

 2,327,697 Issued Aug. 24, 1943. F. G. Boucher. "Gravity Meter." 

 2,331,904 Issued Oct. 19, 1943. G. V. A. Gustafsson and J. D. Malmqvist. "Geophy- 

 sical Instrument." 

 2,337,152 Issued Dec. 21, 1943. D. H. Clewell. "Gravity Meter." 

 2,338,811 Issued Jan. 11, 1944. A. F. Hasbrook. "Level Indicator." 

 2,341,323 Issued Feb. 8, 1944. J. M. Ide. "Gravity Meter." 

 2,346,593 A. R. Lindblad and J. D. Malmqvist. 

 2,347,702 H. B. Maris. 

 2,349,404 D. W. Blair and F. G. Boucher. 

 2,351,955 A. Graf. 



2,355,421 D. H. Clewell and H. A. Maeder. 

 2,356,206 F. G. Boucher. 

 2,357,356 O. S. Petty. 

 2,357,822 A. F. Hasbrook. 



2 362 135 Issued Nov. 7, 1944. P. H. James. "Leveling Device for Gravimeters." 

 2,362,872 Issued Nov. 14, 1944. L. T. Weagle. "Spirit Level." 

 2,367,126 Issued Jan. 9, 1945. P. H. James. "Gravimeter Null Indicator." 

 2,369,802 Issued Feb. 20, 1945. G. V. Rylsky. "Liquid Level." 

 2,372,252 Issued March 27, 1945. D. H. Clewell. "Pilot for Gravity Meters." 

 2,377,889 Issued June 12, 1945. L. J. B. LaCoste and A. Romberg. "Force Meas- 

 uring Instrument." 

 2 383,966 Issued Sept. 4, 1945. A. F. Hasbrook. "Geophysical Prospecting Apparatus." 

 2 383,997 Issued Sept. 4, 1945. R. C. Sweet. "Gravity Meter." 

 2,384,586 Issued Sept. 11, 1945. F. J. AUgeo. "Level." 



2,384,739 Issued Sept. 11, 1945. A. F. Hasbrook. "Geophysical Prospecting Ap- 

 paratus." 

 2,385,424 Issued Sept. 25, 1945. C. L. Shue and F. J. Allgeo. "Level." 

 2,389,866 Issued Nov. 27, 1945. M. E. Moore. "Apparatus for Making Gravity 



Measurements." 

 2,402,666 Issued June 25, 1946. A. Raspet. "Helical Spring." 

 2,404,786 Issued July 30, 1946. L. G. Bostwick and J. H. King. "Electromechanical 



Device." 

 2,417,392 Issued March 11, 1947. R. Craig and R. Q. Boyer. "Torsion Balance." 

 2,418,786 Issued April 8, 1947. F. H. Nadig and J. L. Bohn. "Hydraulic Inferometer." 

 2,432,875 Issued Dec. 16, 1947. E. Flint. "Level Indicating Device." 

 2,438,758 Issued March 30, 1948. C. C. Leach. "Liquid Column Level." 

 2 441,166—2,441,167 Issued May 11, 1948. A. Raspet. "Helical Spring." 

 2,444,669 Issued July 6, 1948. J. C. Pollard and C. F. Sellers. "Support for Sub- 

 merged Area Surveying." 

 2,446,325 Issued Aug. 3, 1948. W. H. Gille. "Leveling Support." 



