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Browse by Date |
| Patent Number |
Title Of Patent |
Date Issued |
| 4257721 |
System for placement of piles into the seafloor |
Mar. 24, 1981 |
| 4257720 |
Apparatus and method for driving members into the ocean floor |
Mar. 24, 1981 |
| 4257719 |
Underwater pipelines |
Mar. 24, 1981 |
| 4257718 |
Semi-submersible pipelaying craft equipped for laying pipes on sea beds, including deep beds, an... |
Mar. 24, 1981 |
| 4257717 |
Method and apparatus for installing a power cable or a similar elongated member between two bodi... |
Mar. 24, 1981 |
| 4257716 |
Roll-formed metal eavestroughing with plastic fittings |
Mar. 24, 1981 |
| 4257715 |
Binder assembly |
Mar. 24, 1981 |
| 4257714 |
Device for coupling a pair of rods |
Mar. 24, 1981 |
| 4257713 |
Conical pen |
Mar. 24, 1981 |
| 4257712 |
End of paper indicator for typewriters |
Mar. 24, 1981 |
| 4257711 |
Proportional spacing impact printing apparatus |
Mar. 24, 1981 |
| 4257710 |
Continuous process mixing of pulverized solids and liquids and mixing apparatus |
Mar. 24, 1981 |
| 4257709 |
Automatic blanking circuit |
Mar. 24, 1981 |
| 4257708 |
Apparatus for measuring the degree of rinsing |
Mar. 24, 1981 |
| 4257707 |
Device for measuring the attenuation of optical waves on optical transmission paths |
Mar. 24, 1981 |
| 4257706 |
Motor vehicle back-up limit gauging method and apparatus |
Mar. 24, 1981 |
| 4257705 |
Device for focus detection or distance detection |
Mar. 24, 1981 |
| 4257704 |
Distance measuring finder |
Mar. 24, 1981 |
| 4257703 |
Collision avoidance using optical pattern growth rate |
Mar. 24, 1981 |
| 4257702 |
Apparatus for ascertaining color balance of photographic printing paper |
Mar. 24, 1981 |
| 4257701 |
Image information recording apparatus |
Mar. 24, 1981 |
| 4257700 |
Electrophotographic apparatus |
Mar. 24, 1981 |
| 4257699 |
Metal filled, multi-layered elastomer fuser member |
Mar. 24, 1981 |
| 4257698 |
Cassette film type indicator for a still camera |
Mar. 24, 1981 |
| 4257697 |
Projecting member carried by the base plate for cameras |
Mar. 24, 1981 |
| 4257696 |
Photographic printing apparatus |
Mar. 24, 1981 |
| 4257695 |
Film projection gate |
Mar. 24, 1981 |
| 4257694 |
Projection system |
Mar. 24, 1981 |
| 4257693 |
Cine camera |
Mar. 24, 1981 |
| 4257692 |
Method of marking ophthalmic lenses of organic material and lenses so marked |
Mar. 24, 1981 |
| 4257691 |
Line of sight display apparatus |
Mar. 24, 1981 |
| 4257690 |
Eye testing chart |
Mar. 24, 1981 |
| 4257689 |
Pulse pattern visual acuity device |
Mar. 24, 1981 |
| 4257688 |
Eye examining instrument |
Mar. 24, 1981 |
| 4257687 |
Eye examining instrument with photo-detecting system |
Mar. 24, 1981 |
| 4257686 |
Multiple layer piezoelectric wavefront modulator |
Mar. 24, 1981 |
| 4257685 |
Acousto-optic device |
Mar. 24, 1981 |
| 4257684 |
Electrochromic segments formed on a display electrode in an electrochromic display cell |
Mar. 24, 1981 |
| 4257683 |
Electrochromic display |
Mar. 24, 1981 |
| 4257682 |
Liquid crystal color display cell |
Mar. 24, 1981 |
| 4257681 |
Automotive rear view mirror |
Mar. 24, 1981 |
| 4257680 |
Mirror assembly for patients with personal hygiene problems |
Mar. 24, 1981 |
| 4257679 |
Reproducing objective for video disks |
Mar. 24, 1981 |
| 4257678 |
Wide angle photographic lens |
Mar. 24, 1981 |
| 4257677 |
Retroviewer |
Mar. 24, 1981 |
| 4257676 |
Device for collecting light |
Mar. 24, 1981 |
| 4257675 |
Optical-fiber submarine cable and manufacturing method thereof |
Mar. 24, 1981 |
| 4257674 |
Elastomeric fiber optic splice |
Mar. 24, 1981 |
| 4257673 |
Device for coupling at least three light guides |
Mar. 24, 1981 |
| 4257672 |
Optical coupler for connecting a light source to an optical transmission line |
Mar. 24, 1981 |
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