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Browse by Date |
| Patent Number |
Title Of Patent |
Date Issued |
| 4272235 |
Method and apparatus for folding and sealing a floppy disc envelope |
Jun. 9, 1981 |
| 4272234 |
Pelletizing apparatus |
Jun. 9, 1981 |
| 4272233 |
Mold for producing extra thin walled plastic containers |
Jun. 9, 1981 |
| 4272232 |
Particle blender |
Jun. 9, 1981 |
| 4272231 |
Air cooling ring for plastic film with independent lubricating air for film guide surface |
Jun. 9, 1981 |
| 4272230 |
Slip form for building components |
Jun. 9, 1981 |
| 4272229 |
Pivotal piston machine |
Jun. 9, 1981 |
| 4272228 |
High volume dispensing pump |
Jun. 9, 1981 |
| 4272227 |
Variable displacement balanced vane pump |
Jun. 9, 1981 |
| 4272226 |
Fluid pump and method for operating same |
Jun. 9, 1981 |
| 4272225 |
Electromagnetically-operated fixed displacement pump |
Jun. 9, 1981 |
| 4272224 |
Splined shaft driving arrangement |
Jun. 9, 1981 |
| 4272223 |
Fluid dynamic energy exchanger |
Jun. 9, 1981 |
| 4272222 |
Boom apparatus |
Jun. 9, 1981 |
| 4272221 |
Undercarriage for adverse terrain vehicles |
Jun. 9, 1981 |
| 4272220 |
Drum lifter for fork lift truck |
Jun. 9, 1981 |
| 4272219 |
Vehicle towing apparatus |
Jun. 9, 1981 |
| 4272218 |
Apparatus for transporting a wheelchair upon an automobile |
Jun. 9, 1981 |
| 4272217 |
Fork lift attachment system |
Jun. 9, 1981 |
| 4272216 |
Machine tool lubrication system |
Jun. 9, 1981 |
| 4272215 |
Remote control countersink adjustment |
Jun. 9, 1981 |
| 4272214 |
Floating fence for the collection of liquid impurities as for example oil on a water surface |
Jun. 9, 1981 |
| 4272213 |
Extendible screeds |
Jun. 9, 1981 |
| 4272212 |
Method and apparatus for rejuvenating and recycling asphalt |
Jun. 9, 1981 |
| 4272211 |
Wear resistant slab |
Jun. 9, 1981 |
| 4272210 |
Interchange system |
Jun. 9, 1981 |
| 4272209 |
Anti-vandalism nut assembly |
Jun. 9, 1981 |
| 4272208 |
Connector device |
Jun. 9, 1981 |
| 4272207 |
Joining device |
Jun. 9, 1981 |
| 4272206 |
Safety ink pen |
Jun. 9, 1981 |
| 4272205 |
Signal controlled indexing rate shifter for a typewriter |
Jun. 9, 1981 |
| 4272204 |
Automatic margin determining apparatus for a scanned sheet of paper |
Jun. 9, 1981 |
| 4272203 |
Apparatus for adapting an office machine to one-handed operation |
Jun. 9, 1981 |
| 4272202 |
Ribbon cartridge with broken unidirectional friction drive and self cleaning gears |
Jun. 9, 1981 |
| 4272201 |
Ribbon shaper for typewriter cartridge |
Jun. 9, 1981 |
| 4272200 |
Horn loaded piezoelectric matrix printer drive method and apparatus |
Jun. 9, 1981 |
| 4272199 |
Mixing container |
Jun. 9, 1981 |
| 4272198 |
Device for the dispersion of cement solutions |
Jun. 9, 1981 |
| 4272197 |
Apparatus and method for measuring the ratio of two signals |
Jun. 9, 1981 |
| 4272196 |
Optical sizing mask and process |
Jun. 9, 1981 |
| 4272195 |
Method and apparatus for determining the wavelength of light |
Jun. 9, 1981 |
| 4272194 |
Rotation sensitive ring laser system |
Jun. 9, 1981 |
| 4272193 |
Method and apparatus for timing of laser beams in a multiple laser beam fusion system |
Jun. 9, 1981 |
| 4272192 |
Holographic shearing interference contrast method and interferometer |
Jun. 9, 1981 |
| 4272191 |
Device for indicating a particular angle in pipelaying work or similar operations |
Jun. 9, 1981 |
| 4272190 |
Optical measuring system |
Jun. 9, 1981 |
| 4272189 |
Electro-optical projectile analyzer |
Jun. 9, 1981 |
| 4272188 |
Exposure compensation circuit for a copier |
Jun. 9, 1981 |
| 4272187 |
Automatic alignment of optical elements in an electrophotographic apparatus |
Jun. 9, 1981 |
| 4272186 |
Camera method and apparatus for recording with selected contrast |
Jun. 9, 1981 |
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